Pollution on the hoof

Americans love beef. According to the 2000 census, the U.S. ranks No. 3 in the world in per-capita consumption of beef and veal (after Argentina and Uruguay), gorging on 100 pounds per year. We're also among the leaders in obesity, heart disease and colorectal cancer, and there is a connection -- fatty red meat has been linked to all of these conditions.

McMichael's idea isn't likely to gain much traction outside Australia; he proposes that developed countries lower their daily intake of meat from about 250 grams to 90 grams, with no more than 50 grams coming from ruminant animals -- that's less than 2 ounces, or half a McDonald's Quarter-Pounder.

Still, as evidence mounts that cutting back on beef would both improve our health and help stave off global warming, a campaign urging people to do so is clearly in order. It's understandable why political candidates are wary of bashing beef, but less understandable why environmental leaders with nothing to lose are reluctant to raise the issue. They would be more credible in targeting polluters if they were equally assertive in pointing out what all Americans can do to fight global warming, and at the very top of that list -- way ahead of more commonly mentioned approaches such as buying fluorescent lightbulbs or energy-efficient appliances -- would be eating less red meat.

A University of Chicago study examined the average American diet and found that all the various energy inputs and livestock emissions involved in its production pump an extra 1.5 tons of CO2 into the air over the course of a year, which would be avoided by a vegetarian diet. Thus, the researchers found, cutting out meat would do more to reduce greenhouse gas emissions than trading in a gas guzzler for a hybrid car.

The U.S. Department of Agriculture assesses ranchers, dairymen and producers of other commodities to pay for marketing campaigns to promote their products, raising millions of dollars a year and turning such slogans as "Got Milk?" and "Beef: It's What's for Dinner" into national catchphrases. This isn't quite tantamount to a government-mandated campaign to promote cigarette smoking, but it's close. The government should not only get out of the business of promoting unhealthful and environmentally destructive foods, it should be actively discouraging them.