Humans eat an astonishing amount of meat every year-some 800 billion pounds of it, enough flesh to fill roughly 28 million dump trucks. Our desire for meat, particularly in industrialized countries like the United States, is one reason why the planet is warming as fast as it is. Raising animals consumes a lot of land that could otherwise soak up carbon. Cows. sheep, and goats give out heat-trapping methane （甲烷）. And to grow the corn, soy, and other plants that those animals eat, farmers spray fertilizer that emits nitrous oxide （一氧化二氮）， another planet-warming gas.
Cutting out meat sounds like an effective approach. But what would happen if everyone actually stopped eating meat tomorrow? Such a quick shift probably wouldn't cause the sort of turmoil that would come if the planet immediately abandoned fossil fuels. But still, the consequence could be quite chaotic, causing different problems.
Researchers say the economic damage caused by the sudden disappearance of meat would fall disproportionately on low-income countries with farming economies, like Niger or Kenya, where farming and raising livestock are critical sources of income. Getting rid of livestock overnight would not only deprive many people of essential nutrients, but also threaten food security, especially in regions like South Asia and sub-Saharan Africa. Besides, there's the issue of cultural damage. Taking away meat, according to Wilson Warren, a history professor at Western Michigan University, would do more than just deprive Americans of hot dogs and hamburgers and Italians of salami.
Rejecting meat entirely, let alone immediately, isn't an ideal solution to the climate crisis. Dutkiewicz, a political economist at the Pratt Institute, suggested using guidelines established by the EAT-Lancet Commission, an international group of scientists who have designed a diet intended to give people the nutrients they need without destroying the planet.