Environmental protection

Problem of contamination of nature in connection with activity of man. Air's and water's pollution. Garbage as the main reason of pollution of cities. Influence of radiating radiations on people and animals. Value of preservation of the environment.

Рубрика Экология и охрана природы
Вид презентация
Язык английский
Дата добавления 13.12.2011
Размер файла 1,4 M

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