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Two studies concluded that biofuels are worse for global warming than conventional petroleum fuels; one of the studies calculated that harvesting grass for fuel creates 93 times more carbon emissions than are saved by the production of cleaner fuel.

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Two studies concluded that biofuels are worse for global warming than conventional petroleum fuels; one of the studies calculated that harvesting grass for fuel creates 93 times more carbon emissions than are saved by the production of cleaner fuel.

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