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"While there are daily references in the media to the diversion of corn to fuel-making, there's hardly ever a mention of the fact that feeding our livestock uses 50 percent to 60 percent of the American corn crop. Here are the calculations used by the US Agriculture Department's Economic Research Service for how much corn animals must be fed to produce a pound of meat for retail sale: seven pounds of corn equals one pound of beef; six-and-a-half pounds of corn equals one pound of pork; two and six-tenths pounds of corn equals one pound of chicken. (Meat industry estimates are lower but generally refer to the amount of corn necessary to make the live animal gain a pound, not the amount necessary to get a pound of food in the meat case.) Corn is a dietary staple in parts of the world like Mexico, but not here in the United States, where the answer to "What's for dinner?" is supposed to be "beef." Talk about feeding SUVs or people is deceptive, since it masks the intermediate step of feeding animals a whole lot of corn to get one steak dinner.
Even more hidden from public view is the role of animal feeding in global warming. The shocking fact is that production of beef, pork and poultry is a bigger part of the climate problem than the cars and trucks we drive, indeed of the whole transportation sector. In our fantasies -- and ads -- we see contented cows eating grass, but the fact is all but a lucky few spend much of their lives in dismal feedlots where grass does not grow, getting fat on corn and other unspeakable byproducts. Internationally, two-thirds of the earth's available agricultural land is used to raise animals and their feed crops, primarily corn and soybeans, and the trend is accelerating as people in Latin America and Asia increasingly demand an Americanized diet rich in meat. The need to grow more animal feed and more animals has been devastating rainforests and areas like Brazil's Cerrado region, the world's most biologically diverse savannah, long before the demand for biofuels began escalating.
Vegetarians have long understood this issue, but asking the American public to eat less meat is still a radical idea, politically untouchable. Yet the meat industry is a giant source of greenhouse gases, of which carbon dioxide is only one, and not the most dangerous one. All those steer feedlots and factory buildings crammed with pigs and chickens produce immense amounts of animal wastes that give off methane. On an equivalent basis to carbon dioxide, methane is twenty-three times more potent as a greenhouse gas. When you add in the production of fertilizer and other aspects of animal farming (including land use changes, feed transport, etc.) livestock farming is responsible for nearly one-fifth of human-induced greenhouse gas emissions, more than the transportation sector, according to a 2006 report by the Food and Agriculture Organization of the United Nations.
None of which excuses knocking down trees in a rain forest to grow fuel crops or burning dirty coal to make a supposedly cleaner, biofuel substitute. People around the world for whom corn and other grains are a food staple -- not an ingredient or animal feed -- need help to avoid starvation, regardless of the reason, be it biofuel production, drought, flood or war. Someone like Al Gore needs to have the courage to stand up and exhort Americans to eat less meat so that others do not go hungry."