Question 9 is based on the conversation you have just heard.

W: Why is it important to recycle?

M: There are many reasons. Recycling is one way to keep waste out of landfills. Landfills are places to dump waste. (9) But they are unpopular, because they can pollute the soil used to cover them and that’s bad for people who may build new homes there. Recycling also reuses valuable raw materials, such as aluminum and paper. Finally, recycling can leave a lower garbage bill. Recycling lowers the amount of waste put into landfills, therefore, less money is spent for garbage disposal.

W: How has recycling changed over the years?

M: (10) Ten or twenty years ago, you could buy milk in returnable, refillable, glass bottles, and many people recycled voluntarily. Now you buy milk and other products in plastic bottles or paper containers. Because of the high cost of disposing of these things in landfills, many city governments now have recycling programs.

W: How does recycling help the environment?

M: (11) Recycling helps the environment mainly by saving energy. For example, it takes 95 percent less energy to produce recycled aluminum than to produce new aluminum.

W: Can one person really make a difference? If only a few people recycle, then what’s the point?

M: If not you, then who? (12) If we combine our efforts, we can make a difference. Each of us contributes to the waste problem. All the millions of tons of waste that go into landfills started as an old pair of slippers, a broken TV set, or a used magazine that came from somebody’s house—maybe yours!

(9 ). Why are landfills unpopular according to the man?

解析：细节理解题。问题为：根据男士说的话，为什么填埋垃圾会变得不受欢迎？根据原文But they are unpopular, because they can pollute the soil used to cover them and that＇s bad for people who may build new homes there可知，填埋垃圾并不受欢迎，因为这样会污染掩盖垃圾的土壤，对在这些土地上盖房子的人非常有害。由此可知，垃圾填埋会污染土壤，A选项（垃圾会污染盖在它上面的土壤）与原文信息完全一致。