空气污染文章。50字。

发布网友发布时间：2022-05-03 04:34

共1个回答

热心网友时间：2023-10-09 16:05

Air pollution is one of the major problems of the modern world. A great deal of energy is needed to run the factories of modern instrial nations. Automobile, trains, planes and busses need energy, too. Nearly all of this energy is proced by burning fuels. The burning proces wastes, some of which remain in the air, causing air pollution

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