题型：翻译 题类：常考题 难易度：普通
仁爱科普版九年级上Unit 2 Saving the earth. Topic 1 Pollution has causestoo many problems.同步练习1
Noise pollution can cause as well.
Most people don't that they polluted air.
We need to the local .
, environmental pollution becomes a big social problem.
Burning coal and oil pollutes the air, and it our health .
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