global warming - the increase in world temperatures caused by gases such as carbon dioxide that are collecting in the air around the earth and stopping heat escaping into space, ozone depletion - destruction of the ozone layer providing ozone holes, ocean pollution - harmful substances in the waters, often consisting of waste from vehicles, industry, plastic , fresh water problem - lack of potable water, deforestation  - the cutting down of trees in a large area, or the destruction of forests by people, overpopulation - the fact of a country or city, etc. having too many people for the amount of food, materials, and space available there, endangered species - a type of animal or plant that might extinct because there are only a few of that type alive,

Environmental problems definition

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