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...animals that humans eat, none are held more responsible for climate change than the ones that moo. Cows not only consume more energy-intensive feed than other livestock; they also produce more methane - a powerful greenhouse gas - than other animals do. "If your primary concern is to curb emissions, you shouldn't be eating beef," says Nathan Pelletier, an ecological economist at Dalhousie University in Halifax, N.S., noting that cows produce 13 to 30 lb. of carbon dioxide per pound of meat. (See where cows eat and what it means for the environment...
This math works out in part because farmers like Shinn don't use fertilizers or pesticides to maintain their pastures and need no energy to produce what their animals eat other than what they get free from the sun. Furthermore, pasturing frequently uses land that would otherwise be unproductive. "I'd like to see someone try to raise soybeans here," he says, gesturing toward the rocky, sloping fields around...
...many standards, pastured beef is healthier. That's certainly the case for the animals involved; grass feeding obviates the antibiotics that feedlots are forced to administer in order to prevent the acidosis that occurs when cows are fed grain. But it also appears to be true for people who eat cows. Compared with conventional beef, grass-fed is lower in saturated fat and higher in omega-3s, the heart-healthy fatty acids found in salmon. (See pictures of the world's most polluted places...
...eat 12 servings of fruits and vegetables a minute...
...With their dazzling orange and gold skins and fat bellies, the individual dragonfish are soothing enough to watch swim around Yap's tanks. Until, that is, they are paired with another dragonfish, after which they present a more gruesome spectacle. "They either try to eat each other or fight each other to the death," explains one of Yap's employees, who pairs each dragonfish with a stingray, which hovers over the tank's bottom and stays out of his aggressive neighbor's way. (See pictures of new species found in the Mekong Delta...