Double Nature

We are people reversing climate change. We draw down CO2 with natural climate solutions. We double nature and foster the fundamental conditions for the new nature economy.

Join us

Photo by Shane Rounce


Climate Cleanup Foundation is a non-profit funded by members.
Together we pioneer in doughnut accounting, seaweed, soil, plants, trees and rock weathering.

Adriaan Korthuis
Climate Focus
Dirk Steen
Willemijn Wortelboer
Gold Member
Matthea de Jong
Warming Up – Tolhuistuin

We remove 1500 gigaton of CO2

To contain the climate crisis we need to remove 1500 gigaton of CO2. This happens to be about what is already stored by all plants and trees on earth. So to remove 1500 gigaton, we need to double nature. We reverse climate change by developing natural climate solutions in actual projects and we foster the fundamental conditions for entrepreneurial people to flourish in the new nature economy.
What we do

Double Nature


Fostering fundamental conditions

We foster the fundamental conditions for the 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

What we do



We do. Innovation needs experiment, therefore we pioneer solutions, particularly in seaweed and rock weathering. We develop this up to proof concept, so markets can take up what we start and grow in a distributed way.

trees | sand | seaweed


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

Carbon removal accounting standard


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.

Drawdown | 2040


Sand / Minerals
New ship with olivine arrives in the Netherlands
Climate Cleanup | 14 Jul 2020
Recently a new ship with olivine has arrived at Wijk bij Duurstede in the Netherlands. Take a look at this video featuring entrepreneur Eddy Wijnker of greenSand and advisor and scientist Pol Knops. Thanks to Stefan Flos of H2video who made this olivine explainer (with English subtitles) Click here to watch.
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Climate Cleanup
Sargassum Cleanup – from plague to climate solution 
Climate Cleanup | 30 Jun 2020
Finally, the time was right to tell the world about our Sargassum Cleanup project. Seaweed is potentially a super scalable climate solution with incredible benefits. (more…)
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More news

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, children, decision makers and anyone who wants to double nature and reverse climate change.


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