Mixing biochar with concrete actually makes it harder (or you can add less cement to it), while storing CO₂ (biochar is a viable CO₂ pit). Can't link the sourc

Mixing biochar with concrete actually makes it harder (or you can add less cement to it), while storing CO₂ (biochar is a viable CO₂ pit). Can't link the sources because mobile, but if you're interested look it up, it's really interesting. It's being certified in France right now.