A deer is a ruminant mammal belonging to the family Cervidae. A number of broadly similar animals from related families within the order Artiodactyla (even-toed ungulates) are often also called deer. Male deer grow and shed new antlers each year, as opposed to antelope, which are in the same order and bear a superficial resemblance to deer physically, but are permanently horned.

The critics are right. Corn-based ethanol isn't very economical or environmentally helpful. It inflates food prices, and it's propped up by foolish subsidies and tariffs. But to write off biofuel is to miss the forest for the trees—or, in this case, the grassland for the corn. Enthusiasm for ethanol isn't the problem. It's the solution.

"A deepening water crisis would fuel violent conflicts, dry up rivers and increase groundwater pollution, their report says. It would also force the rural poor to clear ever more grasslands and forests to grow food and leave many more people hungry."