Ya, that's not the only problem. The research on biodiesel from crops is getting pretty mature. It is indicating that biodiesel from crops has an even higher total carbine impact on the environment then diesel or gasoline. This is because of the carbon contribution from defoliation from growing and processing the crops into fuel. The impact on non-greenhouse environmental issues food production are also extreme.
I am burning biodiesel from waste vegetable oil. It is relatively clean (although it still has the NOx problem) and is extremely cheep. With this experience, and what I have learned, I am thinking that CNG may be a better approach. Although not technically renewable, it is an even cleaner burn the biodiesel, and is abundant engulf to carry us until the technology advances on pure renewable energy sources.
Bruce
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