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Answers
11.mathura refinery release harmful smokes wich causes acid rains. this acid rains are very harmful for the taj mahal because it can cause the beautiful colours of taj mahal to faint.this is a huge lose to our national heritage.
12.We are also protected by the atmosphere. It acts as a huge blanket, keeping the Earth warmer than it would be without the atmosphere. This is known as the greenhouse effect. (Without the atmosphere, the average temperature on Earth would be below freezing!) The atmosphere also protects living things on Earth from the sun's harmful ultraviolet radiation. A thin layer of gas called ozone high up in the atmosphere filters out these dangerous rays.but because of our daily activities we are causing pollution in this environment. this pollution has caused holes in the ozone layer which allows uv rays to enter earth. these uv rays are very harmful for our skin because this can cause us skin cancer skin burn and various other diseases.
13.sorry mate i dont know this answer you can surf it through internet