A new study challenges the longstanding view that biofuels are carbon-neutral, and asserts that in the U.S. to date, they have done more harm to the climate than gasoline.
A fight's breaking out over who should pay subsidies for corn ethanol, and it is consumers who may end up paying for any changes.
Ted Cruz opposes subsidies for biofuels and still managed to win in ethanol-friendly Iowa. Is corn ethanol starting to lose its political clout?
A law signed into effect last week seeks to reduce fertilizer runoff that causes toxic algae blooms. But to really address the problem requires taking a hard look at how America farms.