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A、Half of the methane in the atmosphere is from animals. B、Methane has become the chief source of greenhouse gas. C、Consumer beh
A、Half of the methane in the atmosphere is from animals. B、Methane has become the chief source of greenhouse gas. C、Consumer beh
admin
2013-12-21
54
问题
A recent study shows that meat consumption is one of the main ways that humans can damage the environment, second only to the use of motor vehicles. So, how can eating meat have a negative effect on the environment? For a start, all animals, such as cows, pigs and sheep, release a gas named methane, which is the second most common greenhouse gas after carbon dioxide. Many environmental experts now believe that methane is more responsible for global warming than carbon dioxide. It is estimated that 25% of all methane released into the atmosphere comes from farm animals. Another way in which meat production affects the environment is through the use of water and land. 2 500 gallons of water are needed to produce one pound of beef, whereas 20 gallons of water are needed to produce one pound of wheat. One acre of farmland used for raising cows can produce 250 pounds of beef. One acre of farmland used for crop production can produce 50 000 pounds of tomatoes. Many people now see the benefits of switching to a vegetarian diet which excludes meat and fish, not just for health reasons, but also because it plays a vital role in protecting the environment. However, some nutritionists advise against switching to a totally strict vegetarian diet. They believe such a diet which includes no products from animal sources can be deficient in many of the necessary vitamins and minerals our bodies need. Today many people have come to realize that to help the environment and for the human race to survive, more of us will need to become vegetarian.
20. What does a recent study show?
21. What do some nutritionists say about a strict vegetarian diet?
22. What does the speaker think more people need to do?
选项
A、Half of the methane in the atmosphere is from animals.
B、Methane has become the chief source of greenhouse gas.
C、Consumer behavior may be influenced by the environment.
D、Meat consumption has an adverse effect on the environment.
答案
D
解析
事实细节题。短文开头提到,最近一项研究发现,食肉是人类破坏环境的主要方式之一,仅次于机动车辆的使用。
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0
大学英语六级
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