Biofuels which could otherwise be used for food

Biofuels
can power road transportation, HVAC systems in our homes and offices, and
possibly air transportation as well. As of now, liquid biofuels seem the only
alternative to fossil fuels currently in use. Presently, a majority of this
biofuel is derived from livestock which could otherwise be used for food or to
grow food. A series of blows knocked the backers of advanced
biofuels to the floor. Researchers studying the impact of biofuels over their
entire life cycle from crop to car predicted surprisingly large greenhouse-gas
emissions.

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