The technical working group for the Greenhouse Gas (GHG) Protocol’s rules for calculating emissions from electricity, a.k.a. Scope 2, will reconvene in September to “reconcile” more than 1,100 comments submitted about the organization’s pending overhaul of the standard.

That work will continue alongside GHG Protocol’s project to unify its corporate carbon accounting rules with the ISO 14064-1 standard from the International Organization for Standardization. A consultation draft for the unified framework is due in Q2 2027. 

The 122-page feedback summary of GHG Protocol’s much-anticipated Scope 2 overhaul, published July 29, shows very low support for the standards organization’s proposal to require companies to match their electricity consumption on an hourly basis, rather than annually, in order to claim emissions reductions. 

The Scope 2 framework creates a dual reporting structure related to purchased electricity: Location-based inventories reflect the emissions intensity of the grids where a company actually operates, while market-based emissions totals include deductions related to an organization’s renewable energy contracts. The update in process is the first big revision since 2014.

Just 22 percent of all those commenting on GHG Protocol’s feedback draft strongly favored the hourly matching proposal, which is part of the market-based accounting rules. Support was even loower among the businesses that submitted comments about the proposed update, at just 12 percent. The sentiment was especially negative among companies from Eastern Asia and North America.

Nonprofit organizations and academic representatives were split on the proposal: Roughly the same percentage of respondents from these fields supported hourly matching as those who opposed it.

The top three reasons cited for opposition were:

  • Concern that the requirement would discourage corporations from buying clean energy
  • Worries about administrative, data management and audit challenges
  • Sentiment that hourly matching should be optional

Compromise sought

This feedback, along with divided views on other parts of the Scope 2 update, convinced GHG Protocol that changes are warranted. That mirrors a decision by the Science Based Targets initiative to make hourly matching for electricity option under its new corporate net-zero standard, for now. 

“The plurality of the respondents want a more rigorous standard,” said Tim Mohin, CEO of GHG Protocol, referring to the Scope 2 comments received by the organization. At the same time, “there’s a lot of differing opinions on where it should come out.”

The technical working group will meet to work out a compromise, which must be reviewed and approved by GHG Protocol’s independent standards board.

Mohin declined to discuss potential revisions or a timeline. One discussion that the group will definitely reconsider is the so-called “consequential” reporting approach for electricity, which would recognize corporate investments in energy storage or contracts for solar and wind electricity on fossil fuels-heavy grids (even if the company doesn’t have local operations).

That proposal was previously referred to the workstream for GHG Protocol’s emerging Actions and Market Instruments methodology, created to guide how businesses can report on emissions related to investments in supply chains or other areas, sometimes known as insets.

Energy strategists urged the technical working group to keep an open mind by allowing companies to report on an hourly basis if they choose, without making it a requirement. The strategists were encouraged by GHG Protocol’s renewed attention to consequential reporting, which they believe will motivate corporate investments in electricity grids that are still heavily fossil fuels-based.

“It’s as if there were two competing views here: one being between stricter, more environmentally impactful standards in the form of hourly matching and the other being less strict, less impactful,” said Gavin McCormick, co-founder and executive director at nonprofit WattTime, who was “encouraged” by the shift in dialogue. “I keep saying there’s a third option, which is cheap but more impactful options.”

Fewer unique businesses have signed power purchase agreements for solar and wind power this year, because high project demand stoked by data center companies is pushing prices higher and sustainability professionals want more clarity about the electricity accounting rules first, said John Powers, former vice president of global cleantech and renewables at Schneider Electric.

“Getting clear guidance and allowing solutions that are truly impactful, but also possibly feasible and affordable, is what we really need to do,” he said.

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Across new research from GlobeScan and BSR, sustainability professionals at large companies have described an environment in which sustainability efforts are becoming more focused — with a deeper emphasis on compliance, tighter resources and a narrower set of priorities. As companies adapt to these changing conditions, a question emerges: Where will the future sustainability agenda be shaped?

When asked how regional influences on sustainability are likely to evolve over the next three years, respondents pointed to a shifting global landscape. Asia-Pacific stands out as the region most widely expected to gain ground, with nearly two-thirds of sustainability professionals anticipating its role will grow. The European Union and China are also expected to play increasingly important roles in shaping sustainability priorities and standards in the years ahead. There are also signs of growing influence in Latin America, the Middle East and North Africa.

At the same time, respondents are more likely to expect the sustainability influence of the U.S. to decrease (43 percent) than increase (23 percent).

Stacked bar chart showing expected changes in regional influence on sustainability over the next three years.

What this means

The findings suggest a rebalancing of influence, with sustainability increasingly shaped by a broader range of actors, markets and policy environments rather than being concentrated in any single geography or center of gravity. For companies, success will increasingly depend on understanding how sustainability priorities evolve across multiple markets and translating those signals into strategies that are both globally coherent and relevant to local contexts.

Based on an online survey conducted in April and May 2026 among 124 sustainability professionals at companies with annual revenue of $1 billion or more, mostly based in North America and Europe. 

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The opinions expressed here by Trellis expert contributors are their own, not those of Trellis.

Many companies are confused about whether they should purchase only removal credits. These are credits that pull carbon dioxide out of the atmosphere —  from planting trees to novel technologies, such as machines that pull CO2 from the air. By contrast, other credit types reduce emissions at the source, by destroying methane emissions from a landfill, reducing deforestation or other methods.

Which type should your company buy? The guidance is mixed: The Science Based Targets initiative’s (SBTi’s) Corporate Net-Zero Standard historically defined a role only for removals, driving many companies to focus solely on this credit type. Meanwhile, the Oxford Offsetting Principles suggest a dynamic portfolio mix, consisting of a higher percentage of reduction credits today and transitioning over time to removals. 

Recently, the two have converged. SBTi revised its guidance and now recognizes reduction credits as a way for companies to manage responsibility for ongoing emissions in the near term (before their “net-zero” target deadline). Here’s how things stand now:

Wrong reasons to buy removals

Removals are ‘more beneficial to the atmosphere’

A classic analogy is that emissions fill the bathtub (the atmosphere), while removals are a drain removing water from the tub. But today, the bath is being filled more than 20 times faster than it is being drained. And the drain — which today consists almost entirely of forest-based removals — is about 2 billion metric tons of CO2 per year, while the tap, mostly fossil fuel emissions, is 42 billion a year. In short: We desperately need to turn off the tap. Whether we stop a ton of CO2 from being emitted or remove a ton, the impact on the level of water in the bathtub is the same.  

Removal credits have ‘higher greenhouse gas integrity’

There is no intrinsic quality difference between removal-based credits versus reduction credits. Calyx Global has generated more than 1,000 carbon credit ratings and finds a wide quality range within both categories. In short: Removal is not a proxy for integrity. Some removal projects are excellent, some are hollow, and the same is true of reductions. Removals and reductions are nearly equally distributed across the rating scale.

Planting trees, for example, is the top generator of removal credits. But many reforestation credits available today are from monoculture plantations designed for harvesting and selling the timber, not carbon removal. At the same time, reduction credits can be high quality. For example, reducing powerful greenhouse gases from old refrigerant equipment, particularly in countries that do not have facilities to destroy the material, is among the highest quality credit sources in the market today.

Right reasons to buy removals

We need to rapidly scale carbon removal capacity 

Although it is critical to “turn off the tap,” there are good reasons to support removals by investing in such credits. The goal, after all, is to reach global net-zero, and removals will be critical to offset residual emissions. Furthermore, the world is on a pathway that is likely to exceed safe climate change. To pull temperatures back down after this “climate overshoot,” the drain must get much bigger. Scientists estimate that the world will need to remove around 10 billion metric tons of CO2 per year by mid-century to align with Paris Agreement goals. Building that capacity will take concerted effort for decades.

Right now the cost of novel removal technologies is prohibitively high. They need support to bring down their cost — what Bill Gates calls ‘paying down the Green Premium.’ According to Gates, “Unless we can bring these green premiums down by about 95 percent through innovation, I don’t think we’ll hit the goal of zero by 2050.” Purchasing novel removals credits contributes to reducing green premiums for technologies we will absolutely need.

Nature-based removals are good for people and the planet

Nature is responsible for more than 99 percent of carbon removal today. Managing and restoring ecosystems are time-tested and affordable carbon removal solutions. Furthermore, these solutions can have numerous benefits beyond carbon removal. Intact ecosystems protect water, buffer against floods and hold most of the planet’s terrestrial biodiversity. Tropical forests generate much of their own rainfall and seed rain far downwind, so losing them puts agriculture across whole regions at risk. For hundreds of millions of people, forests directly supply food, fuel and income.

However, often the best thing we can do for a forest is to protect it from destruction. Again, label isn’t a proxy for impact: A reduction credit that stops irrecoverable carbon loss often has a greater impact than a removal credit from planting trees. Restoration earns its place where deforestation pressure is low or restoration opportunity dwarfs what’s left to protect.

The way forward: How to decide on removals or reductions

This is not an either/or question: We need both types of credits. The more salient question is what is the right portfolio mix? Removals are more expensive, especially novel removals. Credits that reduce emissions, such as reducing methane from manure or destroying refrigerant gas, tend to be less expensive, but are often less charismatic and harder to explain.

So what should companies purchase? Our guidance is simple:

Spend what you can

The phrase “common but differentiated responsibility” is often used within international climate negotiations. It means every country should reduce emissions, but wealthier nations are expected to do more. This applies to companies as well: A more profitable company might have a higher percentage of removals in their portfolio, while a less profitable company could focus on relatively cheaper reduction credits. Find the portfolio mix that fits your budget. 

Focus on quality 

High-quality credits exist across both removals and reductions for those who work to find them. For example, super-pollutant credits (such as landfill gas) often sell for $5 to $10 a metric ton and can be very high quality.

Neither type of credit is superior; there’s no such thing as  “second class” climate action. The only useful differentiation is between the quality of the credits themselves — and between the companies who do something and those who do nothing.

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Walmart fell short on many of its environmental pledges for 2025, an outcome it foreshadowed in December 2024.

But the world’s largest retailer made demonstrable progress on its carbon footprint: It cut absolute emissions from operations (Scope 1) and electricity (Scope 2) by 7.5 percent to 14.4 million metric tons of carbon dioxide equivalent (mtCO2e) during the 2026 fiscal year ended Jan. 31 — a cumulative reduction of 24.6 percent since 2016. The total for its indirect emissions (Scope 3) rose about 3 percent to an estimated 635 million mtCO2e. 

In addition, Walmart reduced its carbon intensity, which measures emissions as a percentage of sales, by another 11.6 percent for Scope 1 and 2. It has cut emissions intensity for Scope 1 and 2 by more than half since 2016. It also passed the halfway point for its pledge to add 10 gigawatts of new clean energy projects by 2030. 

Future progress will remain “lumpy” because of business growth; global energy policy and limited clean electricity projects in certain markets; and the availability and cost of technologies for decarbonizing delivery fleets and refrigeration systems, Walmart said in its FY2026 ESG Report, published July 29, which includes final tallies for the retailer’s 2025 milestones.

“We’ve always said progress is not going to be linear at the aggregate level,” Kathleen McLaughlin, executive vice president and chief sustainability officer at Walmart, told Trellis.

New 2030 target

Walmart has pledged to reach “zero emissions” by 2040. It committed in 2020 to cut combined absolute emissions for Scope 1 and Scope 2 by 35 percent by 2025, ultimately logging a 24.6 percent reduction, according to the report. “It wasn’t quite the goal we originally set but it was good progress,” McLaughlin said.

Walmart has replaced that pledge with a new, validated science-based pledge for Scope 1 and 2 — aiming for a 28 percent cut by its 2031 fiscal year, based on a 2025 baseline. Judging by last year’s progress, it is one-quarter of the way there. 

One big factor is Walmart’s multiyear project to adopt refrigeration and heating, ventilation and air conditioning equipment that uses refrigerants with a lower global warming potential (GWP).

On-site refrigerants accounted for almost 30 percent of Walmart’s Scope 1 inventory in 2025, but refrigerant emissions were down almost 21 percent because of upgrades — some projects have delivered 80 percent emissions reductions — and better maintenance. Walmart employs more than 600 technicians trained to handle low-GWP options.

“That’s been part of a broader system that’s helped us improve refrigeration emissions, including using AI and data-based tools to get at and predict maintenance requirements and sources of leaks,” McLaughlin said. 

Project Gigaton insights

Walmart continues to report metrics for its decade-old initiative to convince suppliers to reduce, sequester or avoid more than 1 billion metric tons of greenhouse gas emissions, Project Gigaton. It reached that goal — validated by the Science Based Targets initiative — in 2024, but the retailer continues to catalogue the results. 

Cumulative emissions avoided, reduced or sequestered through Project Gigaton reached close to 1.4 billion metric tons in FY2026. The program covered more than 4,300 suppliers for the reporting period; they account for almost 80 percent of Walmart’s U.S. sales.

The biggest drivers of Project Gigaton’s progress in the past year were energy projects such as energy retrofits (almost 34 percent of total) and better food and materials waste management (31 percent of the total estimated impact). 

Walmart is using Project Gigaton to encourage suppliers to support its corporate goal to help “sustainably manage,” protect and restore 50 million acres of land and 1 million square miles of ocean by 2030. 

It has surpassed both goals, according to the report, by encouraging suppliers to embrace practices such as better forest, farming and fishing practices and to use regenerative production techniques certified by third-party organizations.

For example, more than 97 percent of Walmart’s South American beef suppliers have verified policies that discourage deforestation or forest conversions; 100 percent of the suppliers for Walmart’s private-label tea are certified as “sustainable.”

Waste and packaging misses

Walmart fell just shy of a goal to divert 90 percent of its operational waste by 2025 — everything from secondary packaging to shopping carts to unsold merchandise. It reached an overall diversion rate of 84 percent. Walmart hasn’t set a new waste goal.

The retailer also missed all of its 2025 packaging goals, which applied to private label products. For example, Walmart aimed to make all of its packages recyclable, reusable or industrially compostable by mid-decade; it hit 64.3 percent, mostly by offering additional recyclable options. And while the retailer hoped to cut virgin plastic content by 15 percent, it posted increases for the past three fiscal years.

“Progress across our packaging metrics continues to be influenced by trade-offs among product protection, food safety, cost, regulatory requirements, recycled material availability, evolving supplier portfolios and changes in packaging formats that are not yet recyclable at scale,” the company said.

Editor’s note: This story was updated July 29 to clarify Walmart’s “zero emissions” aspiration.

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The Greenhouse Gas (GHG) Protocol is extending the timeline for big updates to its corporate carbon accounting standards, which haven’t seen major revisions for more than a decade.

The extension reflects both the nonprofit’s deepening partnership with the International Organization for Standardization (ISO) and the flood of feedback that GHG Protocol received about proposed changes to the rules for calculated emissions inventories related to purchased electricity, which fall under the Scope 2 category.

GHG Protocol and ISO are aligning their respective standards into a unified framework that corporations can use to calculate their GHG emissions. The goal is to simplify corporate emissions reporting as disclosure regulations come into effect in more jurisdictions — from California and the European Union to Japan and Singapore.  

“The real paradigm is moving from a voluntary system — which is still very much with us today, through things like the Science Based Targets initiative — into this new mandatory world where we’re seeing jurisdiction after jurisdiction take up the mantle of mandatory climate disclosure,” said Tim Mohin, who took over as GHG Protocol’s first CEO on June 1.

What’s affected

Virtually every major organization uses GHG Protocol rules to assess and report their emissions. Its work is developed through a partnership between the World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD). 

ISO is the world’s largest standards organization; its work reflects 177 member countries.

The ISO-GHG Protocol partnership will align the ISO 14064 series with the GHG Protocol Corporate Accounting and Reporting Standard. Both methodologies define how corporations should create comprehensive inventories for operational emissions (Scope 1), purchased electricity (Scope 2) and indirect sources including supply chains (Scope 3). 

A public consultation draft for GHG Protocol’s high-level corporate standard was due in the second quarter, but it has been postponed in anticipation of a first draft for the unified standard in the second quarter of 2027, Mohin said. The unified standard is set to take effect in 2028.

GHG Protocol and ISO will follow their existing governance guidelines during the development process for the unified standard, meaning that stakeholders for both organizations will have a say in the final edition.

Updated Scope 2 workstream

Alongside the unification work, GHG Protocol’s Scope 2 technical working group is planning an in-person meeting in September to “reconcile” the close to 1,100 comments it received on proposed changes to the carbon accounting rules that cover electricity, a major source of emissions for many companies. Close to two-thirds of the responses came from corporations, industry groups and sustainability consultants.

“The plurality of the respondents want a more rigorous standard,” Mohin said. At the same time, “there’s a lot of differing opinions on where it should come out.”

The Scope 2 framework covers a dual reporting structure: location-based inventories, which are based on the emissions intensity of the grids where a company operates; and market-based emissions, which also include an organization’s renewable energy contracts.

Themes from the feedback, which GHG Protocol published for review, included:

  • Very low support for a proposal that would require corporations to match their electricity consumption on an hourly basis, on the same electricity grid region, in order to claim market-based emissions reductions.  
  • Interest in a provision that would only allow companies to make voluntary clean electricity claims if the projects added capacity on grids underserved by renewables.
  • An emphasis on feasibility, with many respondents encouraging a phased introduction of the new rules. 

It’s unclear whether another consultation draft of the proposed Scope 2 changes will be published after the technical working group’s meeting, Mohin said.

GHG Protocol plans to align the Scope 2 workstream with the one for the emerging Actions and Market Instruments standard, which proposes methods for companies to report on the emissions-related impact of their investments in climate solutions and their use of mechanisms, such as purchases of sustainable aviation fuel certificates. 

“It’ll get pulled into the overall package,” he said. “A lot of our stakeholders have been asking for exactly that.”

The feedback cycle for the Actions and Market Instruments methodology closed early this year, and GHG Protocol plans to publish a summary in the near future. The first formal draft is due in the third quarter.

The timeline for GHG Protocol’s standard covering corporate value chains, a.k.a. Scope 3, may be updated. The public consultation draft is due in the second half of 2026, but may be adjusted to align with the ISO-GHG Protocol integration work.

Stay tuned

ISO and GHG Protocol are also collaborating on a new standard for a product-level GHG accounting standard that builds on two existing frameworks: ISO 14067 and the GHG Protocol Product Life Cycle Accounting and Reporting Standard.

The end result will be a co-branded standard, one that will help corporations prepare for the enactment of national carbon border adjustment mechanisms (CBAMs), such as the one adopted by the EU. CBAMs are a form of import fee that consider the embodied carbon intensity of hard-to-abate materials such as steel.

“We believe that an international standard for the carbon intensity of products is absolutely necessary,” Mohin said. “We also know that the [existing] standard needed a lot of updating and work, and that’s what’s going on today.”

The joint technical working group met in mid-July, but timelines for the joint standard haven’t yet been released.  

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In 1962, marine biologist Rachel Carson published “Silent Spring,” her meticulously documented case against the indiscriminate use of pesticides. The book is widely credited with helping to catalyze the modern environmental movement, and its central insight — that ecological systems are interconnected in ways industry routinely ignores — still underpins the way sustainability professionals think about their work.

The sustainability canon (writ large) has grown considerably since then, expanding well beyond ecology to include artificial intelligence, corporate governance and more. Here are nine recent books on topics of relevance to sustainability professionals.

Not the End of the World: How We Can Be the First Generation to Build a Sustainable Planet’

By Hannah Ritchie

Published in 2024, this book comes from Ritchie’s perch as deputy editor and former head of research at Our World in Data and senior researcher at Oxford’s Martin Programme for Global Development. Drawing on data across seven major environmental problems — air pollution, climate change, deforestation, food systems, biodiversity, ocean plastics and overfishing — Ritchie challenges both climate doomism and complacency, arguing that the numbers show real, if incomplete, progress. Bill Gates called the book “eye-opening and essential.” It’s a useful model for professionals navigating a polarized public conversation about how bad, or good, things really are.

‘The Coming Wave: Technology, Power, and the Twenty-first Century’s Greatest Dilemma’

By Mustafa Suleyman and Michael Bhaskar

DeepMind co-founder and current Microsoft AI CEO Mustafa Suleyman teamed up with writer and publisher Michael Bhaskar for this 2023 book, which introduces what the authors call “the containment problem” — the challenge of maintaining control over powerful, fast-proliferating technologies like AI and synthetic biology. It’s an increasingly relevant read for sustainability leaders confronting AI’s ballooning energy and water footprint from data centers, even as the same technology promises breakthroughs in materials science and grid optimization.

‘Crossings: How Road Ecology Is Shaping the Future of Our Planet’

By Ben Goldfarb

Named a best book of 2023 by the New York Times, this work makes the case that roads are among the most underappreciated forces reshaping the planet. Goldfarb, an environmental journalist, reports from around the globe to show how the roughly 40 million miles of roadway on earth fragment habitats, sever migration routes and contribute to what he calls an “insect apocalypse,” while also profiling the road ecologists building wildlife crossings and other fixes. Though its lens is ecological rather than corporate, the book offers sustainability professionals a fresh angle on biodiversity and land-use decisions.

‘Vanishing Treasures: A Bestiary of Extraordinary Endangered Creatures’

By Katherine Rundell

Published in 2024, this book pairs Rundell’s scholarly background in Renaissance literature with a naturalist’s eye for wonder, devoting 23 illustrated essays to endangered animals from seahorses to golden moles. Rundell has said humanity now resembles “Noah’s Ark in reverse,” having lost more than half of the world’s wild animal populations in the past 50 years. It’s a lighter, more playful entry than most sustainability reading lists offer, but the argument that people protect what they find magical, not just what they’re told is at risk, is worth thinking about.

‘The Future of the Responsible Company: What We’ve Learned from Patagonia’s First 50 Years’

By Vincent Stanley and Yvon Chouinard

This 2023 update to 2012’s “The Responsible Company” arrives a year after Patagonia’s founder made headlines by transferring all of the company’s stock to a purpose trust and a nonprofit so that, in the authors’ words, the earth is now its only shareholder. Stanley, who has been with Patagonia since 1973 and serves as its “director of philosophy,” pairs that governance story with practical guidance on cutting environmental footprints, building durable products, mapping supply chains and earning the trust of workers and communities.

‘Becoming Nature Positive’

By Marco Lambertini, Joseph W. Bull, Leroy Little Bear, Harvey Locke, Eva Zabey, Dorothy Maseke and Carlos Manuel Rodríguez

This multi-author book, released as an open-access title in 2025, brings together voices from the Nature Positive Initiative, Business for Nature, the Global Environment Facility and Blackfoot scholarship to define what a “nature positive” economy actually requires. Chapters move from the science of biodiversity loss through the practical mechanics of nature-positive business strategy, finance and governance, aiming to turn what has become a popular but loosely defined corporate buzzword into something measurable. For sustainability professionals under pressure to set nature-related targets alongside carbon goals, it’s one of the more rigorous attempts to translate “nature positive” from slogan to strategy.

‘Climate Capitalism: Winning the Race to Zero Emissions and Solving the Crisis of Our Age’

By Akshat Rathi

Published in 2024 by a Bloomberg Green senior reporter and “Zero” podcast host, “Climate Capitalism” argues that the clean energy transition has quietly become one of the great business opportunities of the era. Rather than dwelling on the case against capitalism made by earlier climate authors, Rathi travels across five continents to profile bureaucrats, engineers and executives bending the emissions curve, from a Chinese official who helped mainstream electric vehicles to an American oil executive pursuing carbon removal. His summary of the shift is blunt: It’s now cheaper to save the world than to destroy it. For sustainability leaders trying to make the business case for climate investment internally, it’s a useful supply of real-world proof points.

Here Comes the Sun: A Last Chance for the Climate and a Fresh Chance for Civilization

By Bill McKibben

McKibben’s 21st book, published last year, arrives nearly four decades after he began writing about climate change in his 1989 debut “The End of Nature.” Where much of his earlier work leaned toward what he’s called his own “dark realism,” this volume is built around a genuinely optimistic economic fact: Solar and wind power crossed below fossil fuels on cost in the early 2020s, and by 2024 more than 92 percent of new electricity capacity added worldwide came from renewables. McKibben backs that arc with ground-level reporting, noting how citizens in Pakistan installed enough rooftop solar in a single year to cover a third of the national grid, and how California nearly halved its natural gas use in two years — while also tracking the fossil fuel industry’s fight to slow the shift down.

‘The Water Remembers: My Indigenous Family’s Fight to Save a River and a Way of Life’

By Amy Bowers Cordalis

This 2025 memoir comes from a Yurok attorney who became general counsel for her tribe and helped lead the largest dam removal and river restoration project in U.S. history, on California and Oregon’s Klamath River. Cordalis traces nearly two centuries of her family’s fight to protect the Klamath and its salmon, from a great-uncle’s landmark Supreme Court case affirming the Yurok Nation’s water and fishing rights to the catastrophic 2002 fish kill that pushed her into law and, eventually, into the coalition that convinced regulators to tear out four dams and reopen hundreds of miles of the river. For sustainability professionals accustomed to thinking about “stakeholder engagement,” it’s a firsthand account of what long-term, generational advocacy actually looks like.

The post 9 must-read books for sustainability pros (2026 edition) appeared first on Trellis.

Here’s a question that’s been keeping me up at night: Are sustainability professionals — all of us, individually and collectively — working at the wrong level? That is, are we making incremental changes inside a shareholder-primacy system that isn’t going to fundamentally shift on any timeline that matters, while the actual root causes sit outside our job descriptions entirely?

That’s the juicy topic that Solitaire Townsend and I tackled in this week’s episode of our “Two Steps Forward” podcast. Fortunately, my co-host had a lot to say on the topic. I think I came away from the conversation able to sleep a bit better.

The random acts of greenness problem

Most of the work we do exists in the middle of a bell curve — the big, fat hump between the incremental (“first, do no harm”) and the consequential (“transform the entire system”) — what I’ve taken to calling “random acts of greenness”: real work that doesn’t necessarily add up to a coherent theory of transformation. Some product changes here, some supply-chain work there. Facilities, employee engagement, philanthropy — disconnected dots that don’t necessarily move the needle in today’s capitalism, where shareholder returns can trump sustainability professionals’ purpose and passion.

For many, sustainability can feel like a Sisyphean task.

Townsend’s advice isn’t to feel bad about that. It’s to stop expecting external validation for it. Reducing emissions and building resilience won’t likely vindicate any of us within our own professional timelines, she said: “We will work our entire careers for a world we don’t get to live in” — the same, she noted, as the suffragettes who never got to vote or the civil rights leaders who didn’t live to see the country’s first Black president.

Narrative identity

Her counter to despair is a framework called narrative identity: treating the current moment — the self-doubt, the sense that you’re not doing enough — as the “cave” stage of a hero’s journey, a test where the only failure is quitting.

I pushed back: A hero’s journey is a personal tale, and this fight is a collective one where none of us is the hero. We’re bit players in a collective drama.

But we landed in a similar place from different directions: The point isn’t whether any individual effort is sufficient, but rather whether you keep going.

Filling in the boxes

The best evidence either of us has that incremental work eventually adds up: renewable energy. Townsend grew up in coal-heated government housing; she now lives in a solar-powered home (as do I) — a complete energy transformation within a single generation.

I had my own version of this story: research that a group of us did 25 years ago into what it would take to make solar cheap, ubiquitous and dominant. Our work produced a 3×3, nine-box roadmap — technology, policy and finance crossed-referenced with standardization, education and aggregation — that we envisioned would take a Herculean effort and decades to bear fruit.

But solar now costs as little as 30 cents an installed watt, well below the $1-per-watt target that once felt like a moonshot. Getting there involved naming the goal and plotting a path. We just kept filling in those nine boxes without much evidence along the way that the approach was working. Until it did.

Beyond incrementalism

This isn’t to argue that a plodding incremental approach by itself is sufficient — at least not without one or more moonshot goals. It’s an argument for separating the question of whether your work matters from the question of whether it feels like it’s making a difference. Those turn out to be different questions.

We also got an update on a topic we’ve covered before on this podcast: Townsend’s “spheres of influence” framework — developed by her firm, Futerra, in partnership with Oxford Net Zero — which would enable companies to claim credit for climate influence beyond their own emissions. Think: product impact, investment influence, policy advocacy and other things. “Spheres” has now been adopted by ISO for its forthcoming net-zero standard, ISO/DIS 14060, currently open for public consultation. Suggested KPIs will be forthcoming at Climate Week NYC in September.

Two Steps Forward is available wherever you get podcasts, including on Trellis.net. Find past episodes at twostepsforwardpodcast.com.

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Do annual sustainability reports matter? 

The theory goes something like this: Reports allow investors to better understand companies, while civil society groups can use them to hold businesses to account.

But such benefits only flow if reports contain the high-quality information that these and other stakeholders require. But a recent University of Chicago Law School study that analyzed more than 15,000 disclosures from 2,100 large companies is calling that assumption into question.

Researchers at the school used a large language model to check the publications for reporting frameworks the companies followed, the specificity of the language used and what they call a “fluff ratio,” i.e., the total number of vague or meaningless sentences (“Our aim is to be a leader in the industry”) divided by the total number of sentences.

More fluff

The team found that the number of companies publishing sustainability reports surged after 2015, as did adoption of popular standards, including those from CDP, the Sustainability Accounting Standards Board and the Global Reporting Initiative.

Companies publishing sustainability reports

Source: What Sustainability Disclosures Disclose, Kim et al (2026)

When the researchers looked at the quality of the information, however, they found that this rush of interest brought uneven benefits, with reports in many cases becoming less quantitative, fluffier and less specific.

How report quality changed over time

Source: What Sustainability Disclosures Disclose, Kim et al (2026)

Companies that have been reporting for longer do produce more concrete reports, note lead author Hajin Kim and colleagues. But that’s not necessarily because they’re getting better at it, they add. Fluff shows improvement: Early reporters have published relatively less puffery in recent years. And companies that started early tend to do better than new arrivals, with neither group improving on specificity or quantitative statements over time. 

“Voluntary regimes that want to move substance, not just adoption, may need firmer agreement on what specific, high-quality disclosure looks like, topic by topic,” conclude the authors. 

Alternative explanation

Kim’s finding has merit, said Maximilian Müller, a financial accounting expert at the University of Cologne. But he noted that the growth in narrative text relative to hard numbers may be about more than hype: As companies disclose more information, more text is needed to explain methods, assumptions and context. 

“The concern is not that hard information disappears,” said Müller, “but that it might become harder to find amid a faster-growing layer of narrative. The key question is therefore whether this growing amount of information is presented clearly and usefully.”

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New data centers purpose-built for artificial intelligence are stoking a natural gas generation boom, forcing double-digit emissions increases at Amazon, Google and Microsoft. But Elon Musk’s frontier AI company, xAI, has the most potential to cause the new pollution, according to a new tracker from climate communications firm Climate Power.

The Data Center Air Pollution Tracker considers planned and operational data centers as listed by research firm Cleanview, evaluating their carbon-intensity using grid pollution metrics from the Environmental Protection Agency, the United Nations and two media organizations, The Financial Times and The Guardian.

The data is useful for corporations ramping up their AI and cloud services usage who want to keep tabs on how those decisions might impact emissions reduction commitments. 

What the scores mean

The eight companies on Climate Power’s list were rated from 1 to 100, based on two factors: how many of their projects plan to use (or already use) behind-the-meter natural gas generators and the electricity mix of the local grids where their data centers are located. A grid that produces 200 pounds of carbon dioxide per megawatt-hour (CO2/MWh) was considered the cleanest; the least clean grids produce 1,000 lbs. CO2/MWh.

A score of 100 would indicate that the company uses only grid-connected power sources from the world’s cleanest electricity grids. 

Amazon was closest to that elusive number, with a score of 68 and an average of 716 lbs. CO2/MWh. It has the lowest ratio of behind-the-meter natural gas projects of the eight companies.

It was followed by Microsoft with a 64 (757 lbs. CO2/MWh) and Google and Meta, which both earned a 61. Google’s lbs. CO2/MWh score was 857 versus 802 for Meta.

Anthropic and Open AI, the two most widely used frontier AI models, were close behind with a 59 and 56, respectively. Oracle received a 51, although its average carbon intensity was lower than Google’s or Meta’s.

xAI’s score was just 6. Its Colossus data center in Memphis uses smog-producing gas turbines that are largely unregulated.

The information is updated on a daily basis; these scores were current as of July 24. 

The ranking equally weighs two factors: behind-the-meter gas generation and grid carbon intensity. Source: Data Center Air Pollution Tracker

Why it matters

The great AI data center buildout has inspired fierce community opposition not just because of their voracious electricity appetite — an estimated 194 gigawatts by 2035, or 20 percent of U.S. power production — but because the Trump administration is encouraging the use of new coal and natural gas to run them rather than clean generation sources.

That runs counter to Climate Power polling from June that suggests voters are far more likely to favor data centers that promise to use clean energy for their operations. Projects that used coal or natural gas had far less support among voters than those linked to solar or wind.

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The opinions expressed here by Trellis expert contributors are their own, not those of Trellis or its editors.

Sustainability executives have learned to read the AI data center buildout at the meter: How many megawatts will it consume? How many gallons? How many acres? How much carbon emitted? These are the right questions, but they arrive too late. By the time a data center is operating, the decisions that determine its environmental impacts have already been made — not in a procurement meeting, but in a term sheet.

The sustainability community has largely ceded the funding side of the data center boom to the finance world. It’s worth reclaiming, because the numbers have grown large enough that how the build-out is financed now shapes what gets built, where and on what kind of power.

The four largest hyperscalers — Amazon, Microsoft, Alphabet and Meta — plan to spend roughly $725 billion on capital investments in 2026, up about 77 percent from last year. The overwhelming majority of that is on AI infrastructure. Goldman Sachs now forecasts more than $5 trillion of combined hyperscaler capital spending between 2025 and 2030. No corporate balance sheet, however rich, absorbs figures like these without strain. Amazon’s free cash flow is expected to turn negative this year. When Meta raised its capex guidance, its stock fell nearly 10 percent in a day.

So, the money is going off the balance sheet. This is the development that sustainability leaders should understand, because it changes everything downstream.

Need for speed

Meta’s two-gigawatt Hyperion campus in Louisiana will draw more power than many American cities. Meta did not build it with its own cash or with debt. It formed a joint venture with the private-credit manager Blue Owl, contributing a minority equity stake, and let institutional lenders including Pimco, Apollo and BlackRock fund the rest through roughly $27 billion in bonds. Meta keeps operational control and leases the campus back. The debt does not appear on Meta’s books. That structure is now the template: Close to $125 billion moved into similar project financing within a matter of months, and total data-center debt issuance nearly doubled in less than a year, to $182 billion.

Why should a sustainability leader care about the financial plumbing? Because the plumbing determines the outcomes that determine their success. CSOs are urged to interrogate AI suppliers on energy and water, but few analyze the financing terms that determine those inputs. “Speed-to-power” financing tends to favor on-site gas over slower clean interconnection; short-term debt to build a 20-year asset narrows operating choices.

Start with power. Financing rewards speed. A lender underwriting a multi-decade, fully amortizing bond wants the asset generating revenue on schedule, which means it needs power on schedule. Clean-power interconnection queues run five to seven years, while an on-site gas turbine takes 18 months to build. For lenders drafting a term sheet, that’s a no-brainer. The need for firm power now, not years from now, is quietly locking natural gas into 20-year assets across the country.

Next, consider duration. These are long-lived buildings financed over decades, using equipment — the chips inside them — that may be obsolete in three to five years. That mismatch creates refinancing pressure, which shapes operating behavior. The incentive to run hot, defer efficiency retrofits and maximize utilization is a financial incentive before it is an environmental one. A campus that must service its debt has little appetite for taking capacity offline to improve efficiency and reduce emissions.

Follow the financing

Finally, consider who holds the paper, because that determines who bears the risk, and where a sustainability leader actually has leverage. The bonds behind these campuses are increasingly held by pension funds and life insurers who seek long-duration yield. New York and Pennsylvania public pensions are invested in the same infrastructure fund behind Meta’s Louisiana project as well as several of Oracle’s data centers and other AI-related infrastructure. Wall Street has begun bundling this debt into securities. The exposure, in other words, is being distributed into long-horizon, fiduciary pools of capital — exactly the type of vehicles that the sustainable-finance community spends its days trying to steward.

And all the above is correlated. Much of this construction rests on a handful of tenants; OpenAI, for example, has committed to well over a trillion dollars of future capacity. If demand for AI services disappoints, or a marquee tenant stumbles, the losses will not stay contained; they will ripple across the insurers and pensions that funded them. Oracle bondholders have already sued over losses tied to its build-out. The last time capital poured into a physical technology bet on this scale — the fiber boom of the late 1990s — the majority of the physical infrastructure sat dark and unused for years. “Stranded asset” is a phrase the climate world coined. It applies here with equal force.

This is why the financing architecture belongs on the sustainability agenda. The environmental footprint and the financial risk of the AI build-out are being poured, together, into the same concrete — and both are being determined in documents most sustainability teams never see.

What to do about it 

So what can a sustainability executive do? Look upstream.

  • Ask how the deal is powered, not just the building. The financing timeline will reveal whether clean interconnection is realistic or whether gas is the default.
  • Ask to see those assumptions.
  • Ask what the lease and offtake terms require of the operator, because those terms, not the ESG report, govern behavior once the plant is running.
  • Join in the discussions while the capital structure is still being negotiated, when a power commitment or a residual-value guarantee can still be shaped, rather than after the bonds are placed and the incentives set in amber.

Sustainability leaders must recognize that the term sheet is now an environmental document, and to treat it as one. The profession spent a decade learning to audit supply chains it did not own. The capital stack is the next supply chain, and it sets the terms for all the others.

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