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

Lipstick tubes, little packets of dressing next to the salad bar, Halloween candy, to-go wipes: In California, all of these could look very different, or disappear entirely, over the next six years, depending on how a new state law is implemented and enforced.

California is the first state in the U.S. to mandate that brands and retailers actively remove plastic from their packaging. The law, known as a source reduction mandate, is part of the state’s landmark extended producer responsibility (EPR) law. Companies have until August 1 to present first-of-their-kind source reduction plans to state regulators.  

Moving EPR upstream 

Traditional EPR regulations focus on funding the collection, transportation and processing of recycling — and California’s law, called the “Plastic Pollution Prevention and Packaging Producer Responsibility Act,” will do all of that while also requiring producers to use less plastic in the first place.  

It outlines legally binding targets on recycling rates, recyclability or compostability, and plastic reduction: Producers have until 2032 to cut 25 percent of single-use plastic packaging and food serviceware by both weight and component. 

Old concept, higher stakes  

A source reduction mandate in the world’s fifth-largest economy will fundamentally change how companies design, produce and sell packaging. California’s law is ambitious, but the concept of source reduction is not new.  

We’re all familiar with how thin, flexible and crinkly plastic water bottles have become. That shift reflects years of engineering and lightweighting designed to use less plastic in each bottle. Now, for the first time, this kind of innovation is required by law and backed by enforceable penalties. 

Greater than the sum of its parts  

Individual companies are not required to meet the source reduction targets alone. Instead, producers must meet the 25-percent reduction target collectively through the state’s Producer Responsibility Organization, which fulfills EPR obligations on behalf of producers. 

Here’s how that will work: Companies are required to submit an individual source reduction plan to the organization, detailing their steps for reducing plastic material by weight and by the number of plastic components. From there, the Producer Responsibility Organization will summarizes those plans and submits the summary to the state regulatory body overseeing EPR implementation, CalRecycle.   

The regulations went live on May 1, and company plans are due on August 1. Sustainability and packaging teams are racing to produce them. And while there might not be an existing playbook for these novel requirements, there are pathways.  

Five pathways to source reduction 

There’s not a lot of guesswork for companies operating in California. The state requires companies’ reduction efforts to fall into at least one of five pathways: 

Reuse and refill: Producers must move at least 10 percent of all single-use plastic packaging and food serviceware to reusable or refillable models.  

Example: Reusable cups are skyrocketing in popularity across EPR states, driven by regulatory changes and reuse companies like Bold Reuse. Reusable cups and foodware are thriving in closed-loop venues like sports stadiums, concert venues, schools and corporate campuses.  

Elimination: Producers can remove packaging components entirely. 

Example: This pathway is tricky because most brands already don’t want to pay for excessive packaging. Still, we’re seeing some innovative solutions. Costco, for example, has removed labels on individual bottles inside its multipacks of water and is embossing its logo onto the bottles instead.

Right-sizing: Producers can lightweight packaging, use product concentrates or move to bulk formats. 

Example: Laundry detergent is a big and diverse packaging category, ranging from large multi-gallon jugs to compact cardboard boxes containing woven, highly concentrated detergent “tiles” that eliminate water and plastic. Formats like Tide Evo tiles reduce the overall plastic and packaging footprint required for P&G to deliver its detergent. 

Post-consumer recycled content: Producers can incorporate recycled content into packaging. The result must be novel and third-party verified, and the new law includes a cap on how much such packages can count toward source reduction efforts.  

Example: Post-consumer recycling (PCR) mandates exist in a handful of states, so incorporation into rigid plastic containers, especially those used in products like household cleaners, beverage containers and personal care packaging, should be relatively standard for producers. The total amount of such material that can be used to comply with the law is capped at 8 percent collectively, so until the responsibility organization sees producers’ plans, we don’t know exactly how much PCR can be used. 

Alternative materials: Producers can transition packaging to non-plastic materials.  

Example: Right now, we’re seeing the paperization of formats that were long considered to be plastics-only, like pouches, candy bar wrappers, blister packs and berry punnets. Such packages are increasingly available in 100 percent fiber-based alternatives. Brands like Babybel have made the switch, with its fun-to-open red wrapper and wax seal.

 The starting line  

The August 1 deadline will force packaging and sustainability teams to answer a question that was previously theoretical: Which packaging can companies let go of, which can be redesigned, and which can be transitioned to reusable formats?  

California’s market size means that these answers won’t stay local. They will ripple through packaging portfolios nationwide, raising the bar for the solutions producers are expected to bring to the table.

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The number of chief sustainability officers at publicly listed companies in the U.S. has declined for the first time in 15 years, data from recruiter organization Weinreb Group shows.

CSO ranks surged in the first half of this decade following a period of slow if steady growth during the 2010s, according to previous editions of the survey, which the group conducts every 18 to 24 months. 

The latest count indicates that the total dropped 10 percent to 193 as of July 1. The fall, from 216 in 2025, is largely due to departing CSOs not being replaced, said Ellen Weinreb, the group’s founder. 

CSOs at publicly listed U.S. companies

Source: The 2026 Chief Sustainability Officer Report, Weinreb Group

A thinning of CSO ranks could be interpreted as another sign of what some call the “sustainability recession,” a downturn in corporate efforts triggered in part by opposition from the current U.S. administration and earlier anti-ESG efforts by other GOP leaders. Some companies created CSO positions for the optics; with the pressure to be seen to be acting on climate lessened, leaders felt free to leave vacant roles unfilled.

Positive forces

Weinreb suggested that other more positive factors are also at work. In some cases, she noted, CSOs have taken on additional responsibility and while “sustainability” has been dropped from their job title it remains part of their remit. In May, for example, Tara Hemmer swapped the CSO position for the chief operating officer role at environmental services firm WM. Elsewhere, sustainability responsibilities have been integrated into other areas of the business — a sign, Weinreb argued, of intent to operationalize the function rather than cut costs.

The trend is consistent with Trellis’ State of Sustainability Profession in 2026 report, a survey of more than 500 sustainability professionals at firms with at least $1 billion in revenue that was released this May. That report found that most businesses have continued to expand their sustainability staff over the past two years, albeit at slower pace than earlier in the decade. In 2024, 74 percent of companies had increased their staff size, with only 4 percent cutting it. This year, 50 percent of companies added people and 26 percent reduced headcount.

How has the number of people working on sustainability changed in the last two years? 

Source: State of the Sustainability Profession in 2026, Trellis Group.

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There are fewer than 20 facilities worldwide that use chemical approaches to recycling plastics, but dozens more are planned. A new standard advocates environmental and social practices for operating these sites. 

The Certification Standard for Responsible Chemical Recycling (a.k.a. SCS-004) was written by SCS Standards and Assurance Systems, building on work initiated by industry group Circle (formerly the Ocean Plastics Leadership Network). Chemical recyclers, multinational brands, startups and NGOs had a voice in its creation. 

Chemical recycling promises to expand the range of materials that can be recycled, but the practice is controversial, in part, because it uses high amounts of energy and requires close attention to water impacts and waste management. 

SCS-004 covers operational processes that chemical recyclers (sometimes referred to as advanced recyclers) use to convert contaminated or hard-to-recycle materials such as tires, flexible plastics or textiles into a reusable form. Those technologies include pyrolysis, depolymerization, solvolysis, methanolysis and gasification. 

The framework includes human rights considerations and allows for several “chain of custody” models, including mass balance, which recyclers use to track incoming recovered materials and link them to specific outputs. 

“Brands are under real pressure to deliver on recycled-content commitments, and chemical recycling is part of how that gets done,” said Victoria Norman, executive director of SCS Standards and Assurance Systems. “But we need to have confidence that the recycling process is done in a responsible way.”

More scrutiny needed

The term chemical recycling covers a vast array of approaches. “Some are part of the solution and worth scaling,” said Mikhail Davis, director of global market sustainability at Interface. “Others use more energy and can create more waste or byproducts. The challenge is knowing which is which.”

For example, carpet maker Interface uses depolymerization technology from Aquafil to turn nylon waste such as fishing nets into high-performing recycled yarn that has a lower impact than virgin production.

The new SCS standard can help companies seeking to increase the recycled content in their products begin to distinguish revolutionary beneficial approaches from processes that are close to combustion-based technologies, Davis said.

Certifications incoming

SCS-004 is one of several emerging chemical recycling standards. For example, the International Organization for Standardization has introduced a broader standard for companies in the recycling and recovery sector, as well as rules for chain of custody systems including mass balance.

ASTM International, Association of Plastic Recyclers, International Sustainability & Carbon Certification, UL Solutions and the European Committee for Standards have published related guidelines, although none are explicitly focused on chemical recycling.

“Taken together, these standards and guidance documents help companies demonstrate their alignment with best practice,” said Julia Farber, senior sustainability manager for circular economy at Eastman, which operates the world’s largest molecular recycling plant in Kingsport, Tennessee.

Eastman participates in many different certification systems; multiple frameworks are often needed to cover different practices.

“When we are certified, we follow the guidelines of the certification programs we participate in and adhere to the best practices for truthfully communicating these accomplishments provided by the regulatory bodies,” Farber said.

The SCS certification arm, a separate division from its standards organization, has launched a program for chemical recyclers interested in being certified in the new standard.  

To earn the core certification, chemical recyclers must publish site-specific information about their operating and environmental permits, along with emissions information about pollutants such as carbon monoxide and particulate matter, as well as the greenhouse gases produced at the site.

Recyclers can earn higher levels of recognition for meeting optional criteria, such as sharing annual conversion rate data or life-cycle assessments. The certifications are valid for three years, verified by annual audits.

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Data storage company Western Digital used an AI-powered email workflow to dramatically increase the quantity of emissions data it’s able to collect from suppliers.

Like many buyers, Western Digital found that collecting data via email was time consuming for both its sustainability team and suppliers. To improve response rates, the commpany worked with Sluicebox, a startup that collects carbon data on the electronics industry, to build an AI that streamlines the email process. 

In a pilot rolled out late last year, the company was able to expand primary carbon data for its biggest suppliers from 30 to 90 percent. The time required to collect the data fell from between five and six months to four weeks, Mrinalini Iyer, Western Digital’s program manager for sustainability operations, said at the AI x Sustainability Showcase at last month’s Trellis Impact 26 event in San Francisco.

Western Digital, which sells storage drives for personal and data center use, included suppliers for several components in the pilot, including the device housing, baseplate and motor. Rather than asking these partners to navigate a form or log into a platform, Sluicebox’s AI agent makes the data request, handles questions from suppliers and synthesizes the raw data into a product carbon footprint that is aligned with International Organization for Standardization rules.

Human in the loop

The idea of asking suppliers to interact with an AI agent rather than a human partner will likely raise concerns in some sustainability teams, as would the risk that corporate leaders will now ask whether teams can be smaller if AI takes on some of their work.

Iyer cast the pilot as a way of redistributing work rather than replacing humans. “Keeping people at the center is an important part of Western Digital’s AI approach,” she said. Team members continue to review outputs and otherwise maintain trust, Iyer noted. “That balance is especially important in sustainability data because the goal is not only speed — it is usable, traceable and defensible data.”

“This changes the role of sustainability teams,” she added. “Instead of spending most of the effort on manual chasing and data wrangling, teams can spend more time on quality review, supplier engagement, methodology, validation and decision-making.”

Next steps

To extend the system, Western Digital is estimating gaps for non-responders using available inputs, such as bills of materials; cross-checking product carbon footprints against supplier disclosures and industry baselines; and flagging outliers so the team can request additional calculation details where assumptions need review. 

“We expect this project to evolve from a data collection workflow into a broader system of engagement, validation and exception management,” said Iyer.

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Risk mitigation trumps cost savings as the top way for sustainability teams to create business value for their organizations, according to an annual survey of chief sustainability officers (CSOs) at publicly traded U.S. companies.

More than 62 percent of the respondents said their ability to identify and offer strategies to address regulatory, supply chain and climate risks resonated with other members of the C-suite.

Exhibit A: Spirits company Suntory in January 2025 appointed its chief sustainability officer, Kim Marotta, to head risk management. “What enterprise risk management has given me is the opportunity to see the big picture,” she told Trellis during a Climate Pioneers interview in February. “Instead of just having environmental risks, they’re business risks.”

Two other ways that CSOs can provide business value are through cost savings related to improved energy, waste management and operational efficiency (52 percent); and initiatives that support customer acquisition and retention (38 percent).

The responses come from the 15th annual CSO insights report from recruiter Weinreb Group. They reflect the opinions of 69 CSOs at U.S. public companies, approximately one-third of the 193 executives who held that title as of July 1. That’s a smaller universe than in 2025, when there were 216 individuals with the title at U.S. public companies.

“CSOs are the futurists of the corporate context,” said International Paper CSO Sophie Beckham, a respondent. “My mandate is to see around corners, build resilience into our business model and create value that will help my company not just navigate but thrive when facing emerging risks and opportunities.” 

What’s shaping sustainability

Customer and business partner pressure is the chief driver of sustainability strategy, according to 62 percent of the CSOs that responded to the survey. Other top drivers are regulatory pressure (57 percent) and investor/shareholder pressure (41 percent).

The top challenges CSOs face today: market and economic uncertainty (62 percent), followed by regulatory requirements (57 percent) — a view that respondents said they share with other top executives within their organization.

Approximately 42 percent of the respondents reported that their responsibilities had broadened in the past year.

“We are reaching a tipping point where ‘sustainable business’ is simply ‘smart business,’ ” said one respondent, who chose to remain anonymous.

That shift is evidenced by the increase in sustainability headcount that is happening outside central teams: 42 percent of the respondents reported that more individuals were hired to add that perspective to other units.

Reporting lines for CSOs are also shifting, a finding mirrored in the latest Trellis State of the Sustainability Profession research published in May, a broader survey of more than 500 sustainability professionals. 

One-quarter of the Weinreb respondents said reporting lines in their organization have changed since January 2025: Just 14 percent are directly accountable to their company’s CEO, compared with 33 percent 18 months ago, while a growing number report to the legal department.

“After tracking the CSO role for so many years, what heartens me the most is the resilience of the people who hold this title,” said Weinreb Group CEO Ellen Weinreb. “There’s rarely a playbook for what they do, yet they negotiate every new challenge with grace and determination.”

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In the weeks since Trellis Impact 26 wrapped up, attendees have largely converged on a handful of recurring themes in their post-event reflections. Across LinkedIn posts, the comments and conversations have centered less on ambitions and future possibilities and more on the present-day realities of execution. Trellis Impact 26 offered a preview of where sustainability leadership is today: a challenging but impactful period where implementation defines success.

In takeaway posts, terms such as “implementation,” “infrastructure,” “resilience” and “operations” appeared far more frequently than familiar sustainability language such as “net zero,” “carbon neutral” or “ESG.”

While many of the reflections focused on practical challenges, they also carried a notable sense of optimism. Rather than questioning whether sustainability progress is possible, our audience is discussing how to accelerate it.

Below, culled from more than two dozen LinkedIn responses, are the themes that are shaping sustainability in the “implementation era.”

Sustainability has entered its implementation era

Corporate sustainability has entered a new phase, one defined less by setting goals than by delivering on them. For years, the field focused on building frameworks, defining targets and publishing commitments.

At Trellis Impact 26, attendees repeatedly observed that the conversation has moved beyond why companies should act to how. The harder question now is how to execute at scale while balancing cost, resilience, regulation and business priorities.

Multiple attendees described this shift: “We’re no longer debating why circularity matters. We’re wrestling with how to make it work,” summarized one attendee.

Execution and methodology discussions surfaced across artificial intelligence, circularity, supply chains, climate tech, reporting and operations.

AI became the clearest example of that shift. 

AI is now an infrastructure challenge

AI has evolved from primarily a technology conversation into an infrastructure one, with attendees consistently focusing on the systems and technologies required to scale it responsibly.

“The scale and speed of deployment are creating a new industrial ecosystem, with constraints in power, materials, and talent driving innovation.” 

Rather than treating AI, energy, water and climate as separate conversations, attendees increasingly framed them as interconnected systems challenges. This theme surfaced across discussions of grid capacity, water, power, cooling, permitting and supply chains. Attendees are focused on building the physical systems needed to support AI at scale.

As AI infrastructure expands into more communities, community engagement is becoming just as important as technical innovation.

Social license matters more than ever

As AI infrastructure expands, attendees emphasized that technical expertise alone won’t determine which projects succeed. Multiple posters suggested that social license, community trust and local engagement are becoming just as important as power, water and permitting.

“Community engagement is emerging as a differentiator: Building local trust through early engagement and prioritizing human-to-human relationships is increasingly critical, with greater emphasis on direct dialogue and listening to navigate rising community expectations.”

The message across attendees’ comments was consistent: Long-term success will increasingly depend on earning trust through early engagement, transparency and ongoing dialogue.

Data must replace promises

As AI moves from experimentation to implementation, companies are increasingly expected to demonstrate measurable progress rather than ambitious commitments. Promises are no longer enough, with one attendee writing, “Show me the data.”

Another attendee put it even more directly: “Promises are cheap. Data is the new credibility.” Whether discussing AI or broader sustainability strategies, commenters emphasized that technology doesn’t replace human judgment or the need for credible evidence.

As implementation defines the next phase of sustainability, measurement will determine its credibility.

Scaling sustainability requires collaboration

As sustainability challenges grow more complex, attendees repeatedly described the need for cross-sector collaboration. Progress increasingly depends on partnerships between utilities, technology companies, developers, policymakers, suppliers and customers. As one attendee put it, “No one solves this alone.”

The same idea surfaced repeatedly in circularity discussions, where one attendee described it simply: “Circularity is a team sport.” The most successful organizations will be the ones best equipped to work across increasingly interconnected systems.

Business resilience is replacing sustainability

“Sustainability is increasingly framed as a business resilience issue,” remarked one poster. Resilience emerged as one of the strongest recurring themes across attendee reflections. 

Rather than treating resilience as separate from climate action, many reflections described the growing convergence of mitigation and adaptation. Organizations need strategies that both reduce emissions and help workers, operations and communities adapt to climate impacts.

Resilience has become the business case that connects sustainability to long-term value, operational continuity and risk management.

The last decade of corporate sustainability was about defining ambitions. Trellis Impact 26 made it clear that the next will be defined by delivering on them.

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The “speed to power” aspirations of Amazon, Google and Microsoft — fueled by their collective investments of roughly $750 billion in data center expansion in 2025 and 2026 alone — are upending their climate goals.

All three reported double-digit emissions increases in their 2025 environmental sustainability updates, largely driven by electricity: Reported emissions for power consumption leapt by more than one-third at Amazon and Google, and by more than 20 percent for Microsoft.

Insatiable power appetites

Google’s electricity consumption surged by 37 percent in 2025 to 43.6 million megawatt-hours — the biggest single-year increase in its history and roughly enough to power the state of Washington for a year. 

“As the rapid evolution of AI is increasing our energy needs, the shift to clean energy is hitting major bottlenecks — like long delays in connecting new energy projects to the grid, fragmented power grids, and a shortage of reliable, around-the-clock clean power,” Google said in its 2025 environmental report, published June 30. 

Since 2019, Google’s power consumption has risen 250 percent. Its location-based electricity emissions, which fall under Scope 2 of the Greenhouse Gas Protocol’s carbon accounting rules, rose 37 percent from 2024 to 2025. 

Location-based emissions are calculated using regional grid market averages; market-based emissions inventories include factors such as green tariffs or renewable energy certificates.

Microsoft reported a 21 percent increase in location-based Scope 2 emissions; its overall electricity consumption rose 24 percent to 37 million megawatt-hours.

Amazon didn’t disclose its overall electricity consumption in its 2025 environmental report, published July 1. The company reported a 34 percent increase for its Scope 2 emissions, but it doesn’t say whether that information is location-based, i.e., based on regional grid market averages; or market-based, which includes factors such as green tariffs or renewable energy certificates.

Amazon also didn’t break out emissions data directly related to Amazon Web Services, although it publishes other metrics such as power usage effectiveness, which measures the power a data center uses for cooling versus running computing equipment. The closer to zero the better.

Amazon’s average usage effectiveness across its data center fleet is 1.14. Google’s ratio is 1.09, and Microsoft’s is 1.17. 

What to watch next

Despite their voracious energy appetites, Amazon, Google and Microsoft stand behind emissions reduction commitments pegged to 2030 and beyond. 

Here’s why: Over the past decade, the three companies have signed contracts to put more than 115 gigawatts of renewable energy, mostly solar and wind power, onto the global electric grid. 

The companies are planning on investments in nuclear energy as a linchpin. Amazon contracted for almost 2 gigawatts of nuclear power last June and signed deals for two new nuclear projects in 2026. Microsoft is backing several next-generation fusion technologies and Google has committed to capacity in Ohio. None has been as bullish as Meta, which has deals for up to 7.7 gigawatts.

Big battery investments will also play a role. At the end of 2025, Amazon had 15 solar energy projects paired with energy storage, approximately 2.3 gigawatts in capacity. Google has made several bets on long-duration batteries, to extend the value of solar and wind contracts. (This is also a priority for Meta.)  

Expect also a sharper focus on Asia.

Amazon supports roughly 2.2 gigawatts of clean energy in the Asia Pacific region, still largely tied to fossil fuels. (For perspective, its overall portfolio globally is about 40 gigawatts.) Google explicitly lists Asia as a sticking point for “carbon-free” electricity purchases, although it signed deals last year in Malaysia and Japan. Microsoft is funding the Southeast Asia Clean Energy Facility, which has so far put $230 million into early-stage projects.

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Meta’s investments in artificial intelligence infrastructure, along with policy shifts that favor fossil fuels, will make it tougher to reach its net-zero goals, but the company isn’t backing off its big-bet climate commitments.

“What has changed is the terrain in which we are operating,” said Blair Swedeen, Meta’s global head of net zero and sustainability, during a Climate Pioneers interview last month on the mainstage of Trellis Impact 26. “When we set these goals in 2020, things were very different.”

Swedeen stepped into his role in April 2023; he previously managed growth partnerships and new business development for the company.

“I’ve been at the company for about 12 years and spent a lot of time operationalizing programs, figuring out how to mobilize against goals and a lot of time cultivating partnerships,” he said. “A lot of those skills ended up being transferable.”

Meta faces the same challenge as the three big AI and cloud computing services vendors: how to manage the tension between ambitious net-zero pledges and rapid data center expansion. Amazon, Google and Microsoft all reported double-digit emissions increases in their latest environmental sustainability reports

Meta isn’t expected to release its next sustainability report until later this year, but the location-based electricity emissions from its data centers rose 16 percent in 2024 (the latest year for which data is available). Meta’s data-center electricity consumption increased 21 percent in the same timeframe.

Challenge: speed to power

The need for speed to power is forcing Meta to contract for as much electricity as it can to run new data centers directly, including new natural gas capacity, through grid connections and on-site resources. 

For example, Meta’s Hyperion data center campus in Richland Parish, Louisiana — its largest yet — will gobble 5 gigawatts of energy from new natural gas generation alongside solar plants and energy storage.

“When we partner with utilities, sometimes natural gas is part of the solution,” Swedeen said. “It’s unfortunate that that’s part of the equation, but the interconnection queues can be four to seven years, right now.”

That reality is driving Meta’s sustainability team — which began sourcing renewable energy in 2013 (before most other big tech companies except Google) — to rethink its clean electricity contract priorities.

Meta and Amazon were the two largest corporate buyers of clean energy in 2025; each signed slightly more than 10 gigawatts in new contracts. Meta’s total portfolio is more than 30 gigawatts globally; nearly 12 gigawatts are already online. Now it’s putting more weight on matching electricity consumption with “stable” sources. 

As of January, Meta had committed to buying more nuclear power than any other U.S. company through existing technologies and next-generation startups, approximately 7.7 gigawatts of capacity. It has also pledged to buy 150 megawatts of electricity from advanced geothermal projects being developed by Sage Geosystems, which are scheduled to come online in 2027.  

This shift has required new contract structures. “All of this investment has really opened up new capital for new technologies that just wasn’t flowing previously,” Swedeen said. 

“We have a number of different ways that we structure agreements on new technology,” he explained. “Everything from committing to be able to take that capacity in the future, reserving that capacity in something that’s much more structured — depending on the maturity of the technology.”

Enter ‘space solar’

Meta is also looking for ways to “extend the usefulness of those renewables that we’ve already procured,” said Swedeen. 

For example, the company’s contract with Noon Energy entitles Meta to up to 1 gigawatt, or 100 gigawatt-hours, of long-duration storage to supplement its existing solar and wind relationships. 

Noon’s modular solid oxide fuel cells can dispatch power for several days when generation from intermittent sources dips. The first project to be deployed on Meta’s behalf is for 25 megawatts, or 2.5 gigawatt-hours, by 2028. Once that installation is completed, Noon will deliver on the rest of the capacity.

Meta has also inked a deal with Overview Energy, an early-stage satellite company that is developing technology to collect solar energy from space and beam it to existing solar farms on the ground in the form of near-infrared light. The idea is to maximize the value of existing assets and allow solar installations to generate electricity around the clock.

“It sounds like science fiction,” Swedeen said. “It’s an early stage technology but it’s quite exciting.” 

Meta is helping fund Overview’s initial demonstration in 2028; the startup seeks to deliver its service commercially by 2030. 

Watch the entire Climate Pioneers interview.

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For two decades, a quiet assumption has propped up corporate climate strategy: Eventually, extreme weather, wildfires and other disasters will get bad enough that corporate boards, political leaders and the rest of us snap to attention and finally take on the hard work of countering, and adapting to, the climate crisis.

Katharine Hayhoe wants that assumption retired.

The atmospheric scientist, Texas Tech professor and chief scientist at The Nature Conservancy — and author of Saving Us: A Climate Scientist’s Case for Hope and Healing in a Divided World — recently joined me and my “Two Steps Forward” podcast co-host, Solitaire Townsend, to talk about why hope beats doom as a communication strategy and what that means for companies watching their own climate commitments slip.

Her clearest example of the broken theory of change is Hayhoe’s home country (although she currently lives in Texas) of Canada. It endured its worst wildfire season on record in 2023, with parts of the country burning coast to coast. The conventional prediction: The federal election nine months later would be a climate election. Instead, voters elected Mark Carney, a former UN climate finance envoy, on a platform that included scrapping the consumer carbon tax.

People didn’t get more motivated to act. They felt overwhelmed and detached because a wildfire that size made the problem feel unsolvable at an individual level.

“The behavioral science is very clear that it’s not enough to make people act,” Hayhoe told us. Worry alone, without a sense that action matters, doesn’t move people — or companies.

The efficacy problem

That’s the piece Hayhoe thinks sustainability teams undervalue: efficacy (rather than urgency). She frames effective climate communication as connecting three things — head (what’s happening), heart (why it matters to what you already value) and hands (what you can actually do). Most corporate climate messaging, she argued, starts and stops at the head, piling on data that raises alarm without giving people — or companies — a next move that feels achievable.

That gap shows up at the top of organizations too. Hayhoe pointed to a version of corporate finger-pointing: The sustainability officer says she’d act, but the CEO won’t let her; the CEO says the board won’t allow it; the board says shareholders won’t stand for it. Meanwhile, the executives who deployed real capital and effort toward targets view those targets as failures when the numbers slip. That, Hayhoe said, is corroding the sense among business leaders that climate action is winnable at the exact moment they need to believe it is.

No more frameworks!

Her prescription isn’t another framework from the top. Asked what one underrated lever she’d hand a Fortune 500 CEO, Hayhoe skipped over tools like renewable power-purchase agreements and science-based targets. Instead, she advocated for internal education that connects climate to what employees already do, paired with an explicit invitation for ideas from people who’ve been doing the job for years — then elevating those ideas as the company’s own thought leadership. In other words, bottom-up input paired with top-down amplification.

Hayhoe was equally candid about her own field’s failures. She’s argued, in a 2018 Science essay (and video) titled “When Facts Are Not Enough,” that scientific literacy doesn’t reliably predict climate acceptance. Identity does. And in a 2024 paper, co-authored with Christel van Eck and Lydia Messling, she pushed back on the idea that scientists should present themselves as neutral, arguing that transparency about one’s own values builds more trust than false objectivity.

She’s putting that perspective into practice through her newsletter, Talking Climate, which is aimed at training more people to be trusted messengers in their own communities. As she put it, this conversation was never going to be finished in just one podcast episode.

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

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

The climate benefits of purchasing carbon credits hold only if the carbon stays out of the atmosphere. For many solutions, though, including nature-based ones like forest protection and restoration, that carbon can eventually be released. Forests burn, pests spread, land use changes. That release is called a reversal, and the risk of it is what the debate over “permanence” is really about: How long will the carbon stay removed, and how confident can a buyer be?

Permanence is among the most contested and confusing issues faced by sustainability executives when investing in carbon credits. The market usually frames it as a binary between “permanent” and “impermanent,” offering little practical guidance. 

Two recent white papers move the conversation from abstract debate to a usable toolkit. Together they offer corporate buyers a shared vocabulary and a clear menu of mechanisms for managing reversal risk.

“Buffer Pools & Beyond” comes from the Science for High-Integrity Frameworks to Transform Carbon Markets (SHIFT-CM) initiative, led by Yale University and The Nature Conservancy. “Contracted Durability” presents a framework from the Beyond Alliance, RMI and the American Forest Foundation. They were developed independently, yet they share the same core insight: Permanence is not a fixed property that a credit either possesses or not. It’s more useful, and ultimately more beneficial to the climate, to think in terms of durability, which varies along a spectrum.

Why the binary framing fails buyers

Carbon markets often use a 1,000-year time horizon to distinguish between permanence and impermanence. But this dichotomy masks important nuance: A high risk of carbon release for one project does not mean that all nature-based solutions offer only short-term storage. Some forests and soils have reliably stored carbon for thousands of years. Treating durability as a binary tends to push policy toward one of two failure modes: Nature-based pathways that are affordable and deployable today get eliminated, or they get approved without ensuring that the carbon stays stored long enough to back the projects’ claims.

Replacing the binary with a continuous concept of durability gives companies a more precise way to talk about how long carbon is likely to stay stored, how confident they can be in that duration and what it takes to close any gap. That enables buyers to match a credit’s durability to the claim the developers are actually making.

A shared vocabulary

The most immediately useful contribution of these papers is language. Both adopt a taxonomy that distinguishes between three kinds of durability:

  • Estimated durability: A projected estimate of the length of time a tonne of carbon dioxide equivalent will remain stored out of the atmosphere based on risk assessments of carbon loss from a given carbon sink. 
  • Guaranteed (or contracted) durability: the length of time a tonne of carbon dioxide equivalent is guaranteed to remain out of the atmosphere by an entity, often through contractual or legal means.
  • Realised durability: how long the carbon actually stayed stored, which can only be confirmed after the fact.

Alongside these sits the durability threshold: the length of time carbon must remain stored to satisfy a given policy, standard, or claim. (the Yale/Nature Conservancy study  calls it “guaranteed durability”; the Beyond/RMI/AFF paper calls it “contracted durability.”)

For a sustainability executive, this vocabulary makes it possible to speak precisely with project developers, standard setters and boards of directors. Rather than  “Is this credit permanent?” the question becomes “What is this credit’s estimated durability, what durability is contractually guaranteed, and does that match the threshold my claim requires?”

The menu of mechanisms

The upshot is that  companies do not need to wait for perfect, centuries-long certainty before acting. A range of mechanisms already exists to manage reversal risk, and a wave of innovation is filling in the gaps. SHIFT-CM presents seven approaches broken into three strategies.

Risk-transfer strategies shift reversal risk from one party to another, usually by pooling it across many projects.

  • Buffer pools withhold a portion of a project’s credits in reserve to replace any that are reversed. They are by far the most common mechanism, with an estimated 10 to 20 percent of credits held in reserve, and nearly every major registry uses a version. 
  • Insurance provides compensation, in credits or cash, when a covered reversal occurs. It’s developing rapidly as a complement to buffer pools, though policies typically run only one to five years, and only credit-based payouts preserve the underlying climate claim.
  • Carbon trust funds (also called permanence trusts or funds) take a fee at issuance into an endowed, independently managed institution that assumes liability for monitoring and compensation, potentially well beyond the project’s own lifespan.

Purchasing strategies can extend durability.

  • Vertical stacking means over-purchasing upfront so that even if some credits reverse, enough remain to cover the claim.
  • Horizontal stacking means sequentially replacing credits as they expire or reverse, carrying the storage obligation forward, potentially into longer-duration storage over time.

Accounting strategies re-quantify a credit’s value based on its durability or climate impact, through risk-weighted portfolio approaches or the more contested time-weighted (“tonne-year”) accounting.

The “Contracted Durability” paper frames the challenge around two functions that any credible solution must perform across the full threshold: ongoing liability (someone responsible for monitoring and compensating reversals at every point) and compensation (tools to make good on a reversal). And it shows that buffer pools and insurance can compensate for reversals but cannot, on their own, assign liability across a long threshold.

Why this matters now

Forward-looking companies should understand these mechanisms now. The EU is defining durability and quality requirements for removals and international credits ahead of its 2040 target. California is shaping permanence standards in a range of legislative processes. The Article 6.4 Supervisory Body under the Paris Agreement is operationalising its standard on non-permanence and reversals, including the still-undefined concept of “negligible risk of reversal.” And SBTi’s updated Corporate Net-Zero Standard is reshaping how companies must treat short- and long-lived removals as they approach net zero.

What to do with this

Match the durability mechanism to the claim being made. Understand what tools are in place to compensate for any reversal that occurs, and for how long each holds. Recognize that combining risk reversal mechanisms will often manage risk better than any single tool.

The main takeaway is that the tools to invest in high-quality nature-based carbon credits with confidence already exist, and they are improving quickly. 

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