True, however 50% is rather optimistic value, it's probobally more. The main source of water is in the ground and the groundwater gets constantly more contaminated with road salt, oil, gasoline and other chemicals (and as you can see, these are all manmade products).
True ;
Nearly 50% of water sources in the U.S. are believed to be polluted due to various environmental factors. While the exact percentage may be debatable, over 40,000 water bodies are classified as impaired by the EPA. This underscores a significant public health concern and the ongoing challenges of water pollution management.
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