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Amazon Indians found an ingenious way to keep soil fertile year on year

Energy

Biochar: the eco lessons of buried treasure

Saving Mother Earth or burying our heads in the soil?

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Bill Gates calls for energy miracles

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Energy

Biogas fuel to undo climate damage?

A new biogas fuel could be 120% greener than petrol

The MoD must decided whether BA's biojet fuel is safe for use

Energy

BA proposes biojet fuel from food scraps

Airline awaits official go-ahead for green energy idea

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