air pollution i one of the major problem of the modern world. a great deal of energy i needed to run the factorie of modern indutrial nation. automobile, train, plane and bue need energy, too. nearly all of thi energy i produced by burning fuel. the burning produce wate, ome of which remain in the air, cauing air pollution. cientit are finding way to top air pollution epecially in big indutrial area and denely-populated citie. they are tudying new way of generating electricity that may be le damaging to the environment. in the meantime, many power plant are being modernized to give off le polluted material. alo, engineer try to deign and locate new power plant to do minimum damage to the environment. however, it may be that we till have a long way to go before we have a "clean" world. nearly all of the countrie are trying hard to prevent and control air pollution. there indeed eem to be no end to tak that environmentalit will be required to do. people will continually find new way to control pollution.