1. Difference between polluted water and potable water? 2. Why is ozone layer important? 3. Why CNG is considered to be a better fuel than petrol and diesel?

1. Difference between polluted water and potable water? 2. Why is oz

1.	1. Difference between polluted water and potable water? 2. Why is ozone layer important? 3. Why CNG is considered to be a better fuel than petrol and diesel?
Answer» er:- The ozone layer present in the upper atmosphere ABSORBS most of the harmful ultraviolet rays of the the sun and prevents them from REACHING the surface of the earth.Ultraviolet rays COULD cause skin cancer.

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1. Difference between polluted water and potable water? 2. Why is ozone layer important? 3. Why CNG is considered to be a better fuel than petrol and diesel?

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