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The Environmental Protection Agency (EPA) dealt a big blow to the ethanol industry earlier this year when it decreed that the corn-based fuel doesn’t have a much better carbon footprint than gasoline made with crude oil. Ethanol producers contend that gasoline also leads to “indirect land-use changes,” and “argues that the corn-based fuel’s environmental credentials should be measured against gasoline made with” oil like that produced by Canada’s oil sands, “not with the lighter and more easily refined crude grades, which are becoming scarcer.” The debate is raising questions about how to extricate the real carbon footprint of a fuel from a complex web of interconnections across continents.
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Tags: Carbon Footprints, emission allowances, EPA