COVER STORY
The Meat of the Matter
Our Livestock Industry Creates More Greenhouse Gas than Transportation Does
By Jim Motavalli
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According to the U.S. Department of Agriculture (USDA), the American meat industry produced more than 1.4 billion tons of waste in 1997—five tons for every U.S. citizen and 130 times the volume of human waste. Michael Jacobson, the longtime executive director of the Center for Science in the Public Interest, adds the fact that just one midsized feedlot churns out half a million pounds of manure each day. “The methane that cattle and their manure produce has a global warming effect equal to that of 33 million automobiles,” the Center reports in its book Six Arguments for a Greener Diet.
That’s just one side effect of raising animals for food. It turns outthat nearly every aspect of the huge international meat trade has anenvironmental or health consequence, with global warming at the top ofthe list. If you never thought that eating meat was an environmental(and by extension, political) issue, now is the time to rethink thatposition.
A Really Big Enterprise
Grazing is itself environmentally destructive. The UN reports that 20 percent of the world’s pastures and rangelands have been at leastsomewhat degraded through overgrazing, soil compaction and erosion.
Methane (a global warming gas 23 times more potent than CO2) comes frommany human sources, but livestock account for an incredible 37 percentof that total. Nitrous oxide is also a very powerful global warming gas(296 times more potent than CO2) and by far the biggest source, 64percent, originates (as does animal-based methane) from manure“off-gassing.” This process of nitrous creation is aggravated byintensive factory farming methods, because manure is a more dangerousemitter when it is concentrated and stored in compacted form.Nitrogen-based fertilizers also emit nitrous oxide. Another byproductof raising livestock is copious amounts of ammonia, which contributesto acid rain and the acidification of ecosystems.
Unacceptable Risks
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And livestock are forcing other animals out. With species loss accelerating in a virtual “sixth extinction,” livestock currently account for 20 percent of all the animal biomass on the planet. As they occupy 30 percent of the planet, they also displace that much wildlife habitat. The grazing of livestock is considered a serious threat to 306 of the 825 “eco-regions” identified by the Worldwide Fund for Nature,and to 23 of Conservation International’s 35 global hotspots for biodiversity.
Upping the Volume
Meatproduction has become a major problem because of its very success as ahuman food. In 1950, world meat production was 44 million poundsannually; today, it has risen fivefold to 253 million tons per year.Pork production, for instance, was less than five million tons annuallyin 1950, but it’s more than 90 million tons today. The average personon the planet ate 90.3 pounds of meat in 2003, double the figure of 50years ago.
These sharp increases are partly the result of dramatically higher meatconsumption in the Third World. China alone now consumes half theworld’s pork, a fivefold increase since 1978.
Dairy cows are particularly important sources of methane because of the volume of food they eat. |
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Selective Solutions
Thefew commentators who have taken on the connection between meatconsumption and global warming ignore the most obvious solution: noteating meat.
The UN report offers a lengthy section entitled “mitigation options”with a range of other choices. To avoid cutting down rainforests thatsequester carbon, the report suggests “intensification of agriculturalproduction on some of the better lands, for example by increasedfertilizer benefits.” The logical conclusion to this suggestion is thetotal confinement factory farming methods used in the U.S.—which, bytwisted logic, could be said to have environmental benefits becausethey are not land intensive (and don’t cut down trees). But theenvironmental problems associated with factory farming are legion, andinclude polluted air and waterways.
OtherUN suggestions include conservation tillage (leaving agriculturalresidue on the soil surface to enrich its health) and organic farmingfor better soil health; improved grassland management; better nutritionfor livestock to reduce methane gas production; and capturing methanein anaerobic digesters to produce “biogas.”
Displaced Wildlife |
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It takes seven pounds of corn to add a pound of weight to a cow, and that’s why 200 million acres of land in the U.S. are devoted to raising grains, oilseeds, pasture and hay for livestock. That land requires 181 billion pounds of pesticides, 22 billion pounds of fertilizer and 17 trillion gallons of irrigation water (not to mention billions of gallons of global warming-aggravating fossil fuel for farm equipment).
Another way of looking at this, supplied by M.E. Ensminger, the former chair of the animal sciences department at Washington State University, is that“2,000 pounds of grain must be supplied to livestock in order to produce enough meat and other livestock products to support a person for a year, whereas 400 pounds of grain eaten directly will support a person for a year.”
Meatproduction is a major factor in deforestation, and grazing now occupies70 percent of previously forested land in the Amazon region. |
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Mostpeople grow up eating meat and seeing others doing the same. Themessage that “meat is good and necessary for health” is routinelyreinforced through advertising and the cultural signals we’re sent atschool, work and church. Vegetarianism is regularly depicted as afringe choice for “health faddists.” The government reinforces thismessage with meat featured prominently in its food pyramids.
Jim Mason, coauthor of the book The Ethics of What We Eat: Why Our Food Choices Matter(Rodale Books), offers another possible reason we’ve kept vegetarianismoff the mainstream agenda. “People who eat meat and animal products arein denial about anything and everything having to do with animalfarming,” he says. “They know that it must be bad, but they don’t wantto look at any part of it. So all of it stays hidden and abusesflourish—whether of animals, workers or the environment.”
Even such an enlightened source as the 2005 Worldwatch report “HappierMeals: Rethinking the Global Meat Industry” is careful not to advocatefor a vegetarian diet, including it in a range of options that alsoincludes eating less meat, switching to pasture-raised “humane” meat,and opting for a few non-meat entrees per week. Vegetarianism is the“elephant in the room,” but even in a very food-conscious age it is noteasily made the centerpiece of an activist agenda.
DanielleNierenberg, author of the Worldwatch study, works for both thatorganization and for the Humane Society of the United States (HSUS).She’s a vegan, and very aware of the climate impacts of meat-baseddiets. But, she says, “Food choices are a very personal decision formost people, and we are only now convincing them that this is a tool attheir disposal if they care about the environment.”
Nierenberg says that some of the Worldwatch report was published in Environmental Health Perspectives,and there was concern that it wouldn’t see print if it overemphasizedvegetarian diets. “People have a very visceral reaction when told theyshouldn’t be eating the core meats they grew up with,” she says. “Theyget upset.”
TheAmerican meat industry produces more than 60 million tons of wasteannually—five tons for every U.S. citizen and 130 times the volume ofhuman waste. |
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Jacobson agrees. “People are pretty wedded to what they eat,” he says. “The government should be sponsoring major mass media campaigns to convince people to eat more fruit, vegetables and whole grains.”
He argues that cutting down meat consumption should be a public healthpriority. “From an environmental point of view, the less beef peopleeat the better,” he says, citing not only the release of methane fromlivestock but also increased risk of colon cancer and heart disease.Jacobson adds that grass-fed, free-range beef (which has less overallfat) is a healthier alternative, but grazing takes longer to bring theanimals to market weight “and they’re emitting methane all that time.”
He posits that the Centers for Disease Control or the Environmental Protection Agency should be convincing Americans to eat lower on the food chain. “There are the environmental and animal welfare problems caused by ‘modern’ agriculture,” he says. “The animals’ retribution is that we die of heart disease and cancer.” Is there an environmental argument to be made for livestock? Gidon Eshel, co-author of the report“Diet, Energy and Global Warming” and a professor at Bard College, says that livestock “has an important role to play in nutrient recycling.Minerals are taken up by growing plants, and when those plants are eaten by grazers, some of it ends up in their tissues and some is returned to the soil in their waste products. But what’s good in small quantities becomes toxic and devastating in large amounts. So it is only beneficial if we were raising livestock in much smaller numbers than we are today.”
Eshel calls for enforcement of the frequently ignored federal Clean Water and Clean Air Acts, which contain provisions to protect against harmful discharges of both animal wastes and the fertilizers used to grow animal feed.
Eating More Meat
Although anaerobic digesters show promise, they are prohibitively expensive. |
With the recognition of meat’s impact on the planet (and the realization that we don’t need it to stay healthy), is it possible that the human diet will undergo a fundamental change? The fact that the cornerstone of the American diet aids and abets climate change is an“inconvenient truth” that many of us don’t want to face, says Joseph Connelly, publisher the San Francisco-based VegNews Magazine. He takes a dig at Al Gore for not mentioning meat-based dietsin his film and only dealing with them glancingly in his book, An Inconvenient Truth (Rodale Books).
A 2003 Harris Poll said that between four and 10 percent of the American people identify themselves as vegetarians. So far, Connelly says that number seems to be holding steady. “From a sustainability point of view, what’s really needed is for people to understand the connections between factory farming, meat eating and environmental impacts,” he says. “That’s the first step.”
Lisa Mickleborough, an editor at VegNews, is probably right when she says that animal concerns are a powerful force for turning meat eating intoa moral issue. To be an animal rights leader is almost by definition tobe a vegan. But few environmental leaders have gone that far. “As an environmental issue, it’s pretty compelling,” she says. “The figures on methane production speak for themselves. But when it comes to doing what’s right for the environment, most people don’t take big steps—they just do the best they can.”
JIM MOTAVALLI is the former editor of E.