We now need to consider that during the global trip the reindeer are “letting out” some of that corn in the form of methane (甲烷，沼气). A resting cow produces 110 kg of methane per year, so flying reindeer would each let out about 4.8 tons. With methane causing 20 times the global warming damage of CO2, and the altitude increasing that damage by 1000% that another 20 times, we can put Santa’s round-trip emissions at 15,488 tons. This is much more than the 100 tons an environmentally-friendly car would release on the same trip!

　　Bad Santa.

　　36. Which aspect does the writer NOT include in her analyses about reindeer’s influence on environment?

　　A. Distance covered.

　　B. Calories consumed.

　　C. Tons of waste let out.

　　D. Money spent on food.

　　37.According to Paragraph 6, how many acres of corn would Santa need to feed 10 reindeer?

　　A. 1.6.

　　B. 16.

　　C. 12.8.

　　D. 128.

　　38.Which of the following statements would the writer most probably agree with?

　　A. Christmas celebrations are really a waste of money.

　　B. Vegetarians are more likely to survive than meat-eaters.

　　C. Raising animals has a negative influence on environment.

　　D. The car industry does less harm to environment than farming.

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