Is This a Good Idea? Do we all need to become vegetarians to fight global warming?

November 10, 2009

After you get done marveling at the record-breaking 185-pound cheeseburger cooked and garnished earlier this year by a Detroit-area sports bar, consider the controversial change in our diets recently advocated by Professor Lord Stern of Brentford, the economist who formerly served as the UK government’s top advisor on the impacts of climate change. He’s the same Lord Stern whose ominous 2006 report predicted that global warming’s unabated effects would eat up 20 percent of the planet’s economic output and cause millions of people to go hungry. In a provocative interview with the Times UK newspaper, Stern argued that raising animals for meat is a significant contributor to the greenhouse effect that causes global warming. He pointed out that animal waste and flatulence releases vast quantities of methane, a gas that is even more potent than carbon dioxide at trapping heat. If we want to stave off the impending climate catastrophe, Lord Stern said, we soon will have to give up meat completely, and switch to a vegetarian diet.

He predicted that people’s attitudes would evolve until meat eating became unacceptable:

“I think it’s important that people think about what they are doing and that includes what they are eating,” he said. “I am 61 now and attitudes towards drinking and driving have changed radically since I was a student. People change their notion of what is responsible. They will increasingly ask about the carbon content of their food.”

But Lord Stern isn’t content to wait for the public to embrace the environmental virtues of vegetarianism. He’d like to see the upcoming UN climate change conference in Copenhagen put taxes on meat--and other foods with a high carbon cost--that would discourage people from eating them.

If you want more background on Lord Stern’s reasoning, here’s a sobering report on the environmental effects of meat cultivation and consumption by the Food and Agriculture Organization of the United Nations.

Lord Stern’s proposition immediately provoked an outcry on both sides of the Atlantic. The Times web site was inundated with hundreds of scathing comments from carnivorous Brits outraged at the prospect of giving up bangers and mash, steak-and-kidney pie and the other bizarre items that pass for cuisine on their island. Columnist Christopher Booker of the conservative Daily Mail newspaper in the UK accused Lord Stern of vastly exaggerating the amount of methane from cattle flatulence, and proclaimed that “the claims of all these veg-obsessives don't stand up to scientific scrutiny.” In the US, Fox News commentator Glenn Beck ranted that the Copenhagen conference could mean “the end of U.S. sovereignty,” and depicted Stern’s proposal as part of an international anti-animal protein cabal that also included Baltimore school officials who recently began offering “Meatless Monday” vegetarian meals in school cafeterias once a week. To Lord Stern, Beck offered this impassioned riposte:

"Good, eat your carrot. I’m going to have a steak. Americans love our steaks, we love our chops, we love our burgers, and I ain’t gonna stop till you throw me in jail, my last meal will be a giant steak!"

But it wasn’t only global warming pooh-poohers like Beck who disagreed with Lord Stern. A New York Times op-ed article by rancher Nicolette Hahn Niman, author of the book Righteous Porkchop: Finding a Life and Good Food Beyond Factory Farms, pointed out that vegetarian diets can also contribute to global warming. The soy substitutes upon which many non-meat eaters depend for protein sometimes are grown on land carved out of the Amazon rainforest, and carbon dioxide is emitted transporting them from Brazil to U.S. consumers.

Moreover, Niman wrote, carnivores don’t have to feel guilty about accelerating global warming, so long as they stop buying meat from animals crammed into pens in giant factory farms, and instead dine on meat from small local farms, whose proprietors raise animals with in an old-fashioned, less environmentally destructive fashion.

"To a rancher like me, who raises cattle, goats and turkeys the traditional way (on grass), the studies show only that the prevailing methods of producing meat — that is, crowding animals together in factory farms, storing their waste in giant lagoons and cutting down forests to grow crops to feed them — cause substantial greenhouse gases. It could be, in fact, that a conscientious meat eater may have a more environmentally friendly diet than your average vegetarian."

So what’s the truth here? Is Lord Stern a visionary savior of civilization, or a supercilious tofu-monger? Is Glenn Beck right that eating big slabs of marbled beef a matter of personal choice, or are future generations going to revile him as an enabler of the self-centered,short-sighted gluttons who helped devastate the planet? Or is Niman correct in saying that there’s an environmentally conscious way to consume meat?

If you’re expecting me to take a side, well, I have to confess that I’m feeling a bit conflicted here. I switched to a mostly vegetarian diet a few years back -- not because of concerns about climate change, but because I felt increasingly uncomfortable taking one cute, loveable species of mammal for a walk in the park, and sticking another, equally cute and loveable species between halves of a sesame seed bun slathered in mayonnaise. On the other hand, I have a wife who needs an iron-rich diet, and a 10-year-old son from Vietnam who has what may be a hereditary craving for pork ribs. (You can imagine how complicated it gets at mealtime in my household.) So just tell me what you think, below. Don’t be bashful.


About Patrick J. Kiger, Science Writer. Patrick J. Kiger has written from print publications ranging from GQ to the Los Angeles Times, and is a longtime contributor to Discovery.com, HowStuffWorks, and other web sites.

For several years, he wrote the Science Channel's "Is This a Good Idea?" blog, and we are proud to have him back! He's also the author of Science Channel's Story of the Week Feature and Creator of Head Rush Science Experiments for Kids.

Patrick is also the co-author, with Martin J. Smith, of Poplorica: A Popular History of the Fads, Mavericks, Inventions, and Lore that Shaped Modern America HarperResource, 2004), and Oops: 20 Life Lessons from the Fiascoes That Shaped America (Collins, 2006). Both are now available on Kindle.

You can see more of his work at www.patrickjkiger.com


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