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Is all the water on Earth polluted?

No, since water can be purified, there is plenty of pure water on Earth. Air pollution circles the entire globe so every major body of surface water has been contaminated to some degree, including the polar ice caps. Underground water is usually pure since it has been filtered through the ground and has not been exposed to air pollution. There are some problems with ground water pollution in certain agricultural and industrial areas, but polluted water can usually be purified by filtering out the bad stuff.


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