The downside to ethanol is the fact that it consumes both fossil fuel and lots of water. This is no free lunch in case one were thinking that. This is quite different from biodiesel depending upon the source of the waste material for this process.

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The downside to ethanol is the fact that it consumes both fossil fuel and lots of water. This is no free lunch in case one were thinking that. This is quite different from biodiesel depending upon the source of the waste material for this process.