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 industrial nations. Automobile, trains, planes and busses need energy, too. Nearly all of this energy is produced by burning fuels. The burning produces wastes, some of which remain in the air, causing air pollution.
Scientists are finding ways to stop air pollution especially in big industrial areas and densely-populated cities. They are studying new ways of generating electricity that may be less damaging to the environment. In the meantime, many power plants are being modernized to give off less polluted material. Also, engineers try to design and locate new power plants to do minimum damage to the environment.
However, it may be that we still have a long way to go before we have a "clean" world. Nearly all of the countries are trying hard to prevent and control air pollution. There indeed seems to be no end to tasks that environmentalists will be required to do. People will continually find new ways to control pollution
空气污染是现代世界的主要问题之一。现代工业国家的工厂需要大量的能源。汽车，火车，飞机和公共汽车需要能量，太。几乎所有的能量都是由燃烧燃料产生的。燃烧产生的废物，其中一些留在空气中，造成空气污染。
科学家正在寻找阻止空气污染的方法，特别是在大工业区和人口稠密的城市。他们正在研究发电的新方法，这可能对环境造成的危害较小。与此同时，许多发电厂正在现代化，以减少污染的材料。此外，工程师尝试设计和定位新的发电厂，以减少对环境的伤害。
然而，我们仍然有很长的路要走，我们有一个“干净”的世界。几乎所有的国家都在努力防止和控制空气污染。似乎没有结束的任务，环保主义者将需要做的。人们会不断地寻找新的方法来控制污染。
