Carbon Returns

We are people reversing climate change. We remove carbon dioxide from oceans and the atmosphere. We double nature by fostering systemic conditions for the regenerative economy.


Climate Cleanup Foundation is an independent entrepreneurial non-profit funded by members.
Together we pioneer systemic interventions to enable carbon returning on land, in oceans,
rocks and constructions.

Sam Levac-Levey

Sam Levac-Levey


Hugo Immink

Hugo Immink


Dianne van den Hombergh

Dianne van den Hombergh

Hospitality Group

Eelco Leemans

Eelco Leemans

Chief of oceans

See all

Construction Stored Carbon Credits

ASN Bank and Climate Cleanup have created a financial metric for carbon storage in the built environment. Based on this metric, with partners like Built by Nature carbon storage is now quantified and monetised, so financials can account and invest towards 1500 gigaton of carbon dioxide returned from the atmosphere.

Double Nature

We restore 1500 gigatons of COby doubling nature

To contain the climate crisis we need to restore 1500 gigatons of CO2. This happens to be about what is already sucked up by all living plants and trees on earth today. So to restore 1500 gigatons, we need to double nature. We reverse climate change by developing Nature-based carbon dioxide removal (Nature-based CDR) and we foster fundamental systemic conditions for entrepreneurial people, and all other life, to flourish in a regenerative society.

What we do


Double Nature Summit

Planning for regeneration and natural carbon restoration at scale

May 22-25, 2023


If doubling nature is the goal, Regeneration is the how. Regeneration is to put life at the center of every action and decision.


2040 – Join The Regeneration is the unique uplifting documentary film by Damon Gameau. The documentary featuring Paul Hawken (Project Drawdown) and Kate Raworth (Doughnut Economics) integrates the ideas in Drawdown and Doughnut Economics, and provides actual images of the future we create.

Fostering fundamental conditions

We foster the fundamental conditions for the regenerative new nature economy. Natural Climate Solutions can provide over 30% of the solution to reverse climate change, but receive not even 3% of funding. We are closing this gap by creating the conditions for entrepeneurial people and organisations to flourish.

Read our green paper

4th Global Enhanced Weathering Conference

May 4th, 2022

What we do


We do. RD&D are much needed for natural carbon returning, because potential is huge and largely untapped. We develop in practice as well as in our Natural Climate Solutions Lab.

Ocean | Land | Rock


We foster the fundamental conditions for people to thrive in the new nature economy.


We show the world what we want. We envision how beautiful the world will be in a new nature economy. We’re always fact-based: we show what can be done. And then we do.

Regeneration | Drawdown | 2040


Launch ONCRA at the COP27 in Egypt

ONCRA is out in the world. We launched ONCRA live from COP27 with co-founders and removers, from Bamboologic, The Seaweed Company, Scave, Boer in Natuur and greenSand. Take a look at the recording of the launch on our You Tube Channel. Join the ecosystem at,…

Book launch: Dutch translation Regeneration, ending the climate crisis in one generation

We’re very happy and proud the conversation between Lynn Zebeda and Paul Hawken at Pakhuis de Zwijger in Amsterdam, is online on our channel. Together with publisher Lemniscaat and partners we presented the Dutch translation of the book Regeneration, ending the…

Successes and failures 2021 / 2022

Thanks to our members we we able to work on a lot of interventions during the year 2021 / 2022. Click and take a look at the summery.

Revolution in the Housing Market: Financing for CO2 Storage Makes Its Debut

Ballast Nedam Development and Climate Cleanup Foundation jointly open the internationalmarket for CO2 storage in construction and real estate projects. Ballast Nedam Development is taking the step as the first construction and development company to market CO2 storage in its housing projects, a historic moment for the real estate and construction sector. The company is doing this with help from the Climate Cleanup foundation. The first project the company…

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Scope zero

Is the business community aware of Scope 0? Since the Paris climate agreement in 2015, reducing greenhouse gas emissions has been prominent on the agenda of governments and businesses. If and how companies take into account cleaning up their historical emissions – aka Scope 0 – , and what vision they have for it is unknown. To find out, a research program was launched today. Reduce and remove This…

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How Paulownia trees double nature and sequester CO2

Eric Litjens is growing the fastest growing tree on earth – which also makes it the tree that is the fastest to sequester carbon. Join the 66th Double Nature Talk! Language: DUTCH Former fruit tree grower Eric Litjens is removing carbon with Paulownia trees. At the Double Nature Lunch Talk on Tuesday 26 September, he will reveal all the secrets of this tree, which is native to China. They…

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Join The 1500 Club

The 1500 Club supports our work. We are 1500 people taking responsibility for the removal the 1500 gigaton of extra CO2 in our atmosphere, using nature based solutions. The 1500 Club is by and for parents, entrepreneurs, investors, youth, decision makers and anyone else who wants to double nature and reverse climate change.

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We work with a network of great entrepreneurial people and organisations. If you would like to join us, just drop us a line.