Biochar proponents get spammed

George Monbiot wrote about the carbonisation of organic matter in the Guardian last month ('Woodchips with everything. It's the Atkins plan of the low-carbon world', Tuesday 24 March 2009), saying it was yet another miracle cure for the climate problem. And, like previous miracle cures, he said ‘biochar’ would turn out to be a dangerous delusion. It would deflect attention from taking real action on climate change. Parts of the planet would be turned into vast forest plantations with limited biodiversity to provide feedstock for huge factories. Vital food-growing land would be lost to vast corporations farming wood for turning into biochar. It is a re-run of the biofuels disaster, he said.

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Why do global land use patterns matter so much?

George Monbiot rightly observes that the earth's resources of biomass are limited and cannot be simultaneously claimed for multiple uses: liquid biofuels, fuel for heating, biogas, and biochar. This presentation looks at the globe's land and biomass production to assess how much space can be given over to non-food uses and how much energy this can generate. This is one of the crucial questions facing the world: how much energy can we use from biomass before this affects the ability of the world to provide enough food for nearly 7bn people, rising to at least 9bn by 2050?

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