Which country did the woman visit A: Because it is a little town. B: Because it is free from pollution and good for shopping. C: Because it is convenient for shopping.

Differences among organic food, green food and pollution-free food are______ ______ ______ ______ ______

酸雨是属于什么污染 A: water pollution B: air pollution C: soil pollution D: noise pollution

If your speech is on environmental problems, what kind of subtopic might be relatively new and novel?( ) A: air pollution B: visual pollution C: noise pollution D: pharmaceutical pollution E: thermal pollution F: water pollution

The author considers it impossible to obtain no-risk food because （） A: many vegetables contain deadly natural chemicals B: almost all foods have additives C: no food is free from pollution in the environment D: pesticides are widely used in agriculture

The author considers it impossible to obtain no-risk food because ______. A: no food is free from pollution in the environment B: pesticides are widely used in agriculture C: many vegetables contain dangerous natural chemicals D: almost all foods have additives

Environmental pollution

Generally, there are two kinds of light pollution: ecological pollution and astronomical light pollution. 不属于 common knowledge.

Now the pollution caused by

Which of the following titles is a proper one? A: What should we do to prevent air pollution? B: An Exploration into the Measures to Prevent Air Pollution C: How does air pollution happen? D: Computer Retrieval