6. Which gas in the upper atmosphere prevents ultraviolet radiations of the sun .
7. Name any two diseases caused by drinking polluted water containing sewage.
8. Name any four toxic metals whose compounds are present in industrial wastes.
9. Name any two types of chemicals used in agriculture which cause water pollution.
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Answer:
6. Ozone gas
7.Typhoid and Diarrhoea
8.Lead and Zinc (not sure)
9. Fertilizers and Pesticides
Explanation:
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