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1、2022年高中英语 Unit 3 Tomorrows World Finding foods for the future教案 牛津译林版必修4随着世界人口增长和气候变化，人类在未来可能会面临食物短缺的问题。目前，许多科学家和研究人员正在与时间赛跑，试图找到好的解决办法。People need to find out new foods because the world has so many mouths to feed. As of xx, there are more than seven billion people on Earth, according to the United
2、 Nations. And by 2100 that number may double, according to some predictions(预测). Feeding all of these people means not only improving the way food is grown, but also finding new sources of foods. And that need is being ever more urgent. If nothing changes, within 35 years, the worlds appetite (胃口) w
3、ill be greater than the amount of food produced. Thats according to a report released last year. It was prepared by the Global Harvest Initiative, a private agriculture group based inWashington, D.C.Global warming, too, is changing food production. Scientists predict that rising temperatures will re
4、duce the growth of important crops like wheat and corn. Low-ine developing countries will be hit the hardest. When harvests fall, crops bee more expensive. And since those foods are also used to feed animals like cows and pigs, meat prices, too, will rise.All over the world, researchers are racing a
5、gainst the clock to figure out how best to feed more people in the future. And some surprising ideas have begun to appear. Three years ago, scientists showed the first hamburger made from meat grown in a lab. Other researchers are developing seeds that can manage to live even during high temperature
6、s and drought. Still others are finding ways to change the genes (基因) of meat animals so they produce more meat and can stand the heat. For example, researchers in South Korea and China are looking into developing a super-pig. These researchers have changed the genes in a type of pig to create an an
7、imal that bees bigger and heavier, packing on more muscle (肌肉). Typically, muscle tissue is the part of an animal that bees meat for food. Biologist Jin-Soo Kim at Seoul National University in South Korea leads super-pig research there.Kim sees a lot of possible uses for the editing technology. Such
8、 gene correction, he says, might help improve crops, fish and livestock (家畜) kept on a farm. “Were now working on changing genes in other large animals, such as dogs and cows,”he says.Dont go looking for super-bacon at your local grocery just yet. Animals with genes changed in the lab havent yet been approved for eating. More studies will be needed to make sure that theyre safe. But Kim and his workmates hope that day wont be far away.
