global warming, water pollution, air pollution, , industrial and domestic waste, deforestation, water pollution, , overpopulation, air pollution, global warming, , global warming, waste disposal, deforestation, , water pollution, industrial and domestic waste , acid rains, , deforestation, endangered animals, water pollution, , water pollution, overpopulation, air pollution, , industrial and domestic waste, air pollution, water pollution.

OGE_Speaking_Environmental Problems_2

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