Major source of water pollution is ___________.
untreated sewage
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Major source of water pollution is ___________.
untreated sewage
Prepare a brief speech on global warming. You have to deliver the speech in your class.
Describe the threat to the beauty of the Taj Mahal.
Why does the increased level of nutrients in the water affect the survival of aquatic organisms?
What are the main causes of smoke?
Which problem arises by air pollution?
What is pollution?
What is air pollution?
Which gases are released by vehicles?
Which gas reduces the capacity of the blood to carry oxygen?
What is smog?
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Mock Test Series