Biofuels to "greatly increase pressure on water"

More harm than good?

Grain based bio fuels - crops grown specifically for bio fuels - continue to draw red flags from the scientific community. Inevitably, fuels driven from grains, such as corn ethanol, are polluting groundwater, lakes, rivers and streams with fertilizer and pesticide runoff resulting in dead zones, such as in the Mississippi River basin and the Gulf of Mexico.

Aside from destroying water resources, a significant increase in such bio fuels could also "greatly increase pressure on water resources" in many parts of the U.S. - greatly diminishing an already scarce resource (more).

Can corn ethanol really be a good idea when so many have already predicted the ever growing importance of water in the very near future?

Isn't it time to end grain based bio fuels? Shouldn't all of our bio fuel efforts be focused on waste driven bio fuels, especially waste-driven cellulosic ethanol?