Double Nature

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

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Photo by Shane Rounce


Climate Cleanup Foundation is an independent entrepreneurial non-profit funded by members. Together we pioneer in carbon removal accounting, seaweed, soil, plants, trees and rock weathering.

Ellen Hooghiemstra
strategy creative
Jeppe van Pruissen
Arno Harpe
civics teacher
Fiona Trappe
The Seaweed Alliance and Seas The Opportunity

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 in scalable seaweed, olivine and agroforestry solutions. 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


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 | Regeneration


Climate Cleanup
Double Nature Talk
We are the mycelium
Climate Cleanup | 27 Aug 2021
Which natural climate solutions are scalable? And how can we accelerate? Wednesday September 1 we kick off a new series of Double Nature Talks live at Tolhuistuin with this most pressing question. How will we remove 1500 gigaton by doubling nature? Mimicking nature, we consider our systemic interventions as mycelium inoculating a growth medium. We invited five innovative people to share their ‘inoculations’, following the four main scalable carbon removal strategies: soil, rock, ocean and (more…)
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Climate Cleanup
Double Nature Talk
Metric enables financial sector to account construction stored carbon
Climate Cleanup | 6 Jul 2021
ASN Bank with Climate Cleanup created a metric enabling the financial sector to account for construction stored carbon. This carbon removal metric enables financial institutions worldwide to measure the carbon stored in biobased buildings. In the Netherlands alone, this may add up to around 50 megaton carbon sequestered this decade. Take a look at the metric and calculation tool here.  (more…)
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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.


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