“Carbon offsets” are a means by which businesses, governments and other entities can pay for projects that cut greenhouse gases in order to “cancel out” some of their own emissions.
- In-depth Q&A: Can ‘carbon offsets’ help to tackle climate change?
- Glossary: Carbon Brief’s guide to the terminology of carbon offsets
- Timeline: The 60-year history of carbon offsets
- Infographic: How are carbon offsets supposed to work?
- Mapped: The impacts of carbon-offset projects around the world
- In-depth Q&A: What are ‘biodiversity offsets’?
- Analysis: How some of the world’s largest companies rely on carbon offsets to ‘reach net-zero’
The topic is contentious, as Carbon Brief’s special series on carbon offsetting has revealed.
The week began with an in-depth Q&A exploring the principles underpinning offsetting and explaining when and why problems have emerged.
Carbon Brief also published new analysis examining which companies are relying on offsets to make “net-zero” claims – and mapped where journalists and campaigners have reported cases of offset projects going wrong.
To conclude this week-long series, Carbon Brief hosted a free webinar that asked how carbon offsets can be reformed.
A video of the recording (below) is now available to watch on YouTube.
The webinar featured four panellists, all of whom have considered this question in their professional and personal lives:
- Dr Barbara Haya, director of the Berkeley Carbon Trading Project at the University of California, Berkeley.
- Kaya Axelsson, net zero policy engagement fellow at the University of Oxford.
- Laura George, governance and rights coordinator of the Amerindian Peoples Association.
- Pedro Martins Barata, associate vice president for carbon markets at the Environmental Defense Fund (EDF) and co-chair of the expert panel at the Integrity Council for the Voluntary Carbon Market (ICVCM).
While all four webinar participants saw the need for considerable change in how carbon offset markets work, their views on what needed to happen diverged considerably.
Haya was clear from the outset that, having studied offset quality for over 20 years, she has consistently found evidence that carbon-offset projects are “over-crediting” – namely, they overestimate the amount of emissions they are cutting:
“The level of over-crediting is really significant. We’re not talking 20-30% overcrediting, we’re talking five times, 10 times, 12 times over-crediting…In the end, I will argue that we need to move away from offsets. I don’t see a way to fix this market.”
The panellists discussed different ways in which offsets could be done differently, including a so-called “contribution” approach. This involves entities buying offset credits, but not counting the emissions cuts towards their own targets, meaning climate action could be supported without misleading claims being made.
Axelsson emphasised that, in her view, the money that can flow from offset purchases to “parts of the world that need that financing” is important.
Therefore, she said her focus is more on ensuring that there are high-quality offsets on the market, with more of an emphasis on offsets derived from long-term emissions storage projects. She added:
“You don’t wash your hands of something once you’ve invested. You have to watch and steward and curate it and make sure communities are involved.”
George, whose organisation promotes and advocates for the rights of Indigenous peoples in Guyana, stressed the importance of considering the rights of these groups when considering carbon-offset projects:
“Things like that can work only if we are informed properly and respect is given…Decisions that are made are impacting Indigenous peoples’ rights, our food security, land tenure security and everything else.”
Barata agreed with other speakers that without a strong regulatory framework “you do have a system where it’s everyone for themselves, nobody checks the quality” of offsets. However, he emphasised that change was possible, stating:
“I’m worried about credit quality very much – and that’s why ICVCM has been set up – and we do hope that over the next few months we will be able to change significantly the landscape of carbon credits.”
Over the course of the webinar, panellists also took questions on REDD+ forest protection schemes, new UN carbon markets and who should be responsible for reforming the trade in offsets.
The post Webinar: How can carbon offsets be reformed? appeared first on Carbon Brief.
Climate Change
Low-Producing Oil Wells in Texas Cause Headaches for Landowners
Jackie Chesnutt, who lives outside San Angelo, is tired of pollution from wells she says should have been plugged years ago. Experts say Texas rules allow companies to defer plugging wells for far too long.
Reporting for this story was supported by a grant from the Fund for Investigative Journalism.
Low-Producing Oil Wells in Texas Cause Headaches for Landowners
Climate Change
America’s Dirty Secret
An interview with author Catherine Coleman Flowers.
The fourth installment in our special Earth Day series
Climate Change
With love: Love to the researchers
When the sciences and the humanities; democracy and ecology, are all under common and increasing attack, the efforts of independent experts and researchers matter more than ever.
David Ritter
So often in life, our most authentic moments of joy are the result of years of shared effort, and the culmination of a kind of deep faith in what is possible.
A few weeks ago, I had the honour of being in Canberra, along with some fellow environmentalists and scientists, to witness the enactment of the High Seas Biodiversity Bill 2026 by our federal parliament.
This was the moment that the Global Ocean Treaty—one of the most significant environmental agreements of our time—was given force through a domestic Australian law.
If you are part of the great Greenpeace family, you will know exactly why this was such a huge deal. The high seas make up around 60 per cent of the Earth’s surface and for too long, they have been subjected to open plunder. Now, for the first time in human history, there is an international instrument that enables the creation of massive high seas sanctuaries within which the ocean can be protected. This is a monumental collective achievement by Greenpeace and all the other groups who have campaigned for high seas marine sanctuaries for many years.
But as momentous as the ratification was, the parliamentary proceedings were distinctly lacking in drama or fanfare–so much so, that Labor MP backbencher Renee Coffey felt the need to gesture to those of us in the gallery with a grin, to indicate that the process was over and done.
The modesty of the moment had me thinking about the decades of quiet dedication by many hands that are invariably required to achieve great social change. In particular, I found myself thinking about researchers. So much of the expert academic work that underpins achievements like the Global Ocean Treaty is slow, painstaking, solitary—and often out of sight.
I think of the persistence and tenacity of researchers as an expression of love, founded in an authentic sense of wonder and curiosity about the world—and frequently linked to a deep ethical desire to protect that source of wonderment.

In 2007, one of the very first things I was given to read after starting with Greenpeace as an oceans campaigner in London was a report entitled Roadmap to Recovery: A global network of marine reserves. Specific physical sensations can tend to stick in the mind from periods of personally significant transitions, and the tactile reminiscence of holding the thin cardboard of the modest grey cover of that report is deeply embedded in my memory. I suspect I still even have that original copy in a box somewhere.
Written by a team of scientists led by Professor Callum Roberts, a marine conservation biologist from the University of York, the Roadmap provided the first scientifically informed vision of a large-scale global network of high seas marine sanctuaries, protecting the world’s oceans at scale. Of course, twenty years ago, this idea felt more like utopian science fiction, because there was no Global Oceans Treaty. But what seemed fanciful at the start of this century is now possible-–and I have every confidence the creation of large scale high seas marine sanctuaries will now happen through the application of ongoing campaigning effort—but we would never have gotten this far without the dedication of researchers, driven by their love of the oceans. And now here we are, with the ability for humanity to legally protect the high seas for the first time.
Campaigning and research so often work hand in hand like this: the one identifying the need and the solutions; the other driving the change. Because in a world of powerful vested interests, good science alone doesn’t shift decision makers—that takes activism and campaigning—but equally, there must be a basis of evidence and reason on which to build our public advocacy.
So, I want to take a moment to think with love and appreciation for everyone who has contributed to making this possible. I’ve never met the team of scientists who authored the original Roadmap, so belatedly but sincerely, then, to Leanne Mason, Julie P. Hawkins, Elizabeth Masden, Gwilym Rowlands, Jenny Storey and Anna Swift—and to every other researcher and scientist who has been involved in demonstrating why the Global Oceans Treaty has been so badly needed over the years—thank you for your commitment and devotion.
And to everyone out there who continues to believe that evidence and truth matter, and that our magnificent, fragile world deserves our respectful curiosity and study as an expression of our awe and enchantment, thank you for your conscientiousness.
When the sciences and the humanities; democracy and ecology, are all under common and increasing attack, the efforts of independent experts and researchers matter more than ever. You have Greenpeace’s deepest gratitude. Every day, we build on the foundations of your work and dedication. Thank you.
Q & A
I have been asked several times in recent weeks what the ongoing war means for the renewable energy transition in Australia.
While some corners of the fossil fuel lobby and the politicians captured by these vested interests have been very quick to use this crisis to call for more oil exploration and gas pipelines, the reality is that the current energy crisis has revealed the commonsense case for renewable energy.
As many, including climate and energy minister Chris Bowen have noted, renewable energy is affordable, inexhaustible, and sovereign—its supply cannot be blocked by warmongers or conflict. People intuitively know this; it’s why sales of electric cars have climbed to an all-time high, it’s why interest in rooftop solar and batteries has skyrocketed in recent months.
The reality is that oil and gas are to blame for much of the cost-of-living pain we’re feeling right now; fossil fuels are the disease, not the cure. If Australia were further along in our renewable energy transition and EV uptake, we would be much better insulated from petrol and gas price shocks and supply chain disruptions.
Yes, we need short-term solutions to ease the very real cost-of-living pressures that Australian communities and workers are facing as a result of fuel shortages. While replacement supplies is no doubt a valid step for now—Greenpeace is also backing taxes on the war profits of gas corporations to fund relief measures for Australians—in the long term, we will only get off the rollercoaster of fossil fuel dependency and price volatility if we break free from fossil fuels and accelerate progress towards an energy system built on 100% renewable energy, backed by storage.
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