求翻译：随着世界人口越来越密集,空气污染已经成了严重的问题。空气污染主要来源于四个主要的人类活动领域：工业、能源业、交通运输业以及农业。经营工厂,为火车、飞机和公共汽车提供动力都需要能源。几乎所有这些能源都是通过燃烧燃料产生的,这就会造成空气污染。科学家们正在研究能减少环境破坏的新发电方式。公共环保意识的增强促成了诸如回收利用等活动的产生。是什么意思？

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As the world population, air pollution has become increasingly intensive became a significant issue. The main sources of air pollution in four main areas of human activity: industry, energy, transport and agriculture. Operating factories, to train, aircraft and buses are required to provide the impe

Is more and more crowded along with the world population, the air pollution has already become the serious issue.Air pollution main origin in four main humanity field of activity: Industry, energy industry, transportation shipping industry as well as agriculture.Manages the factory, for the train, t

As the world population more and more crowded, air pollution has become a serious problem. Air pollution comes mainly from human activities of the four main areas: industry, energy, transport and agriculture. Operates a factory, to power the trains, planes and buses requires energy. Almost all of th

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