Renewable.....not fast enough.
Cheap.....not really as it comes at the expense of increased food prices.
Reduce pollution? When ethanol reduces gas mileage and you have to use more to go the same distance, just how does this reduce pollution or our dependence on foreign oil?
The only people benifitting from ethanol are the farmers getting the subsidies and small engine repair shops.
And not to mention the obscene amount of water required to produce just one gallon.