I have stopped publishing all of my articles on Medium and will only put a few here. My latest articles can be found on https://marginalcarbon.substack.com/ The four latest posts have not been published here on Medium.

Are three trees worth one rock? Permanent storage is always best, but given realistic assumptions on discounting of future damages, as well as long-term climate adaptation — carbon storage lasting centuries could be made comparable to permanent storage. However, carbon re-released before peak warming needs to be replaced and cannot…

It makes more sense not to emit carbon than to remove it. Avoided emissions projects are supposed to be the low-hanging fruit funded before large amounts of money are spent on expensive carbon removals. But there is a lack of mechanisms that lets donors, or carbon credit buyers, support projects…

All companies that plan to use removals in the future should spend a portion of climate budgets on it today. Earlier this week we published the CDR.fyi Year in review, providing an overview of the carbon removal market. There are a lot of exciting numbers and graphs in there so…

How much carbon will we need to remove from the atmosphere? The answer is often determined by looking at how much emissions are expected to remain. For example, seeing that the world still emits 12 billion tons of CO₂e by 2050 in the IEA Announced Pledges Scenario, and drawing…

Carbon removal is necessary to stabilize temperatures along with massive emission reductions. Governments will need to pick up most of the bill. Still, corporate support can play a very important role in catalyzing CDR and other climate solutions, getting new technologies off the ground, and scaling projects that otherwise would…

And other surprising conclusions from thinking about permanence The most common way to talk about the longevity of carbon removed is to talk about permanent or temporary removal solutions. That is the vocabulary I have been using too. But in many cases, it does not accurately capture the characteristics of…

Derisking prepurchases to build capacity. How do CDR suppliers get access to the money they need to remove carbon?Funds are needed today to build facilities, buy land and equipment, pay contractors and sometimes build renewable energy. Venture capital helps, but is typically not used for project financing. As Shashank Samala…

Co-written with Janek Kose at Klarna. Supporting carbon removal is a new endeavour that few companies have gotten involved with so far. It’s essential that early players share their learnings and thinking to help advance the field. In 2021 Klarna realigned its climate program and created a transparent blueprint for…