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New studies show how food and its production affect the globe and its climate. The process of making a hamburger, for example, requires loss of energy. A cow has to be fed and raised on farmland. And cow waste is a major source of methane(沼气)— 1  especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed and shipped,  2  takes fuel. Most of the cow won’t even be used for meat people eat. By the time a hamburger finally lands o a dinner plate,  3 has made bad effect on the environment.

We can reduce the production of global warming gases by eating less beef. Other kinds of meat like pork and chicken do  4  harm to the environment ―at least  5  terms of the amount of greenhouse gases released.  6  , all kinds of meat are harder on the planet that vegetables.  7  changing our diet to less meat and more vegetables, as it turns  8  , may do the world some good.

 

1. an   2. Which 3. it  4. less  5. in 6. However 7. So 8. out

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