Ecological problems

Contamination of atmosphere enterprises. Disappearance of the forests and violation of oxygen balance. Extinction of rare varieties of animals, birds, fishes, drying up of the rivers and lakes. Maintenance of life on a planet for future generations.

Рубрика Экология и охрана природы
Предмет Ecology
Вид презентация
Язык английский
Прислал(а) incognito
Дата добавления 31.10.2013
Размер файла 220,2 K

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