Friends of the Earth said it was now clear that the biofuels target had to be scrapped.
Biofuels campaigner Kenneth Richter said: "This report shows that when MEPs vote on biofuels targets next week they will have the fate of millions in their hands.
"Finding enough land to grow 10% of Europe's transport fuel will lead to more hunger and suffering - as well as doing next to nothing to reduce carbon dioxide emissions.
"Politicians must act responsibly and change course on this disastrous transport policy."
He called on MEPs to scrap biofuels targets and vote instead to double the fuel efficiency of new cars by 2020, which he said would do more to reduce dependence on fossil fuels.
Biofuels campaigner Kenneth Richter said: "This report shows that when MEPs vote on biofuels targets next week they will have the fate of millions in their hands.
"Finding enough land to grow 10% of Europe's transport fuel will lead to more hunger and suffering - as well as doing next to nothing to reduce carbon dioxide emissions.
"Politicians must act responsibly and change course on this disastrous transport policy."
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