Biochar is a climate change solution

As plants grow, they remove carbon from the atmosphere. As plant matter decomposes, carbon cycles back into the atmosphere. If, however, plant-based materials are instead pyrolised—if they are heated in the absence of oxygen—then the carbon is instead transformed into a stable form of mineral carbon: Biochar. Biochar strongly resists the decomposition processes that re-cycle carbon back into the atmosphere.

If long-term carbon sequestration was biochar's only benefit, then the urgency to mitigate climate change would be, in itself, sufficient reason to make as much biochar as possible.

But there are far more benefits in this story . . .

Properties of biochar