Why do people say that ethanol will save the environment?

My vehicles run fine on ethanol. However, you are correct that ethanol is not going to save the environment. For one thing, ethanol is mainly made from corn. More ethanol, higher corn prices. Irritating for us, catastrophic for Mexicans. Besides, if we turned all our corn into ethanol, we still couldnt satisfy the appetite for gas. Ethanol is not going to fix the problem.