Environmental contamination


People have always polluted their surroundings. Automobiles and other new inventions make pollution steadily worse. Scientists and engineers can find the ways to reduce pollution from automobiles and factories. Factories pollute the air and the water.

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Рубрика: Экология и охрана природы

Добавлено: 25.01.2012 03:38:27

Просмотры: 23

Тип: презентация

Язык: английский

Размер: 1,0 M