...meet the faces behind Char2Cool.

Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it’s the only thing that ever has. – Margaret Mead

This quote was written for us… We, the German core-team, are working 168 hours a week to stop climate change. Scroll down to meet us and learn about our backgrounds and motivation.


Walter Danner

Walter is the expert for biogas. He has built biogas plants all over Europe, Asia and Africa. Biogas? Biogas, the initial idea for water hyacinths utilization. But biogas was unsuitable for communities with lack of income and infrastructure. Good thing that Walter thinks two steps ahead… in all directions. He came up with the idea of water hyacinths char and gets everyone excited about his vision! Walter is the initiator and visionary behind Char2Cool


Olivia Thierley

Olivia studied process engineering before leaving university to focus on Char2Cool full-time. She has been working on the ground ever since; developing the C2C-Kiln, advocating for biochar, running the feasibility study and setting up our first production in Ethiopia. You will find Olivia wherever there is work to be done! When she isn’t off-grid she spends her hours building up the online presence of Char2Cool… She is wondering whether you are following us on Facebook yet.


Katharina Danner

Katharina makes sure we are writing black figures… She is the reason that our self-financing system works out. Katharina has studied international management and has been working on renewable energy projects in in Indonesia, Peru, Kenya… Within minutes she will tell you which investments to make, what pay-back periods to expect and when it is better to back out. Katharina is the Head of the Board of Char2Cool e.V.

Join the team!


You want to join the team? We are always looking for motivated interns for our office in Germany, Bavaria. We prioritize commitment over experience! Send an e-mail to info@char2cool.de for more information about internships at Char2Cool e.V.

Support us

You have a skill you want to contribute? We are not hiring at the moment but we are always happy to get to know fellow climate-fighters. Send an e-mail to info@char2cool.de and we will get back to you about ways to get involved.

Part of the problem or part of the solution?

I want to be part of the solution!

Char2Cool Newsletter

Get access to insider knowledge even Google doesn’t know about…

We share our experience about all things biochar in our monthly newsletter. 

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