WHAT ABOUT THE LAND?

A look at the impacts of biofuels production, in the U.S. and the world
BY JULIA OLMSTEAD

Great news! We can finally scratch "driving less" off our list of ways to curb global warming and reduce our dependence on foreign oil! Biofuels will soon not only replace much of our petroleum, but improve soil fertility and save the American farmer as well!

Sound too good to be true? Well, yes. But you could be excused for buying the hype.

Ethanol and biodiesel are being promoted as cures for our energy and environmental woes not just by flacks for corporations like Archer Daniels Midland, BP, and DuPont, but by many eco-minded activists and some prominent environmental groups like the Natural Resources Defense Council as well.

"Even if corn and soy biodiesel have positive energy balances, that's not enough," says Andy Heggenstaller, a graduate student at Iowa State University researching biofuel crop production. "Large-scale production of corn and soybeans has negative ecological consequences. If biofuels are based on systems that exacerbate soil erosion and water contamination, they're ultimately not sustainable."

The effects of corn and soybean production in the Midwest include massive topsoil erosion, pollution of surface and groundwater with pesticides, and fertilizer runoff that travels down the Mississippi River to deplete oxygen from a portion of the Gulf of Mexico called the dead zone that has, in the last few years, been the size of New Jersey.

And according to a recent report by the World Resources Institute, stepped-up corn ethanol production means not only increases in soil erosion and water pollution, but increases in greenhouse-gas emissions. "If your objective is reducing greenhouse-gas emissions, you need to be aware of what's happening in the agricultural sector," says Liz Marshall, coauthor of the WRI study.

TEXT