Ethanol is vodka...it doesn’t pollute the groundwater.
It is not carcinogenic, but it is water-soluble, which leads to contamination of drinking water supplies. The whole theory behind 'oxygenated' fuels such as ethanol and MTBE is invalid since these fuels already have a lower energy potential due to the already existing carbon-oxygen bond. When the costs of ethanol manufacture and shipping are factored in, burning ethanol actually creates more CO2 than it's gasoline equivalent.