air pollution - harmful substances in the air, global warming - a gradual increase in world temperatures, deforestation - the destruction of forests by people, overpopulation - too many people for the amount of food, materials, and space available, ozone layer depletion - holes in layer of air containing ozone high above the earth, loss of biodiversity - when animals and plants become endangered species, water pollution - throwing waste into rivers, lakes and other water areas, waste disposal - there is not enough land for dumps due to massive waste production ,

Environmental Problems

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