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Billed as wonder crop, the establishment of jatropha plantations on the ground in Tanzania has been far from successful, or, in some cases, ethical: a report.

DAVOS: India on Wednesday decried attempts to divert food grains for bio-fuels.

The American food system rests on an unstable foundation of massive fossil fuel inputs. It must be reinvented in the face of declining fuel stocks. The new food system will use less energy, and the energy it uses will come from renewable sources. The seeds of the new food system have already been planted. America's farmers have been reducing their energy use for decades.