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Biology, 30.06.2019 08:00, ineedhelp2285
Human activity has a great impact on the quantity and quality of local water supplies. humans can try to increase awareness and understanding with studying paths, pathogen, pollutants, etc. which will not change as a result of human activity and awareness?
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Answers: 1
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Biology, 22.06.2019 20:00, oktacos
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