Climate 'silver bullet'

Biochar is being hailed as a possible "silver bullet" solution to climate change - a form of charcoal formed by slow-cooking waste plant material that traps carbon for hundreds of years. But critics claim the environment could suffer if natural...

Biochar is being hailed as a possible "silver bullet" solution to climate change - a form of charcoal formed by slow-cooking waste plant material that traps carbon for hundreds of years. But critics claim the environment could suffer if natural habitats are given over to biochar production. One small-scale experiment in England is looking to refine the art of cooking wood for maximum environmental benefit.

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