[george76]

corn ethanol uses tons of water ( a big problem in many states ) and removes corn from the food supply, thus creating higher food prices.

[Mr. Lucky]

The water claimed to be used by ethanol is commonly known as "rain" and the corn applied as ethanol feedstock is not otherwise available as human food.

That being said, subsidies or special tax breaks for any industry, ethanol and oil industries included, are a bad idea.