Q. Greatest decline, being observed over America and Argentina, ranges from 5% to

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Q. When ultraviolet radiations strike ozone, it causes them to

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Q. How much stratospheric ozone layer's concentration extending above earth ?

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Q. Troposphere contains 10% of atmospheric

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Q. Antarctic ozone hole was caused by

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Q. HCFCs can be broken down in lower atmosphere, before ascending into the

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Q. According to scientists, CFCs are supposed to last for more than 100 years, in the

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Q. What screens out 99% of harmful rays of sunlight?

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Q. When did United states ban CFCs usage in spray cans?

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Q. What does high flying crafts deplete ?

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Q. What does ozone depleting chemical, HGs, contributing to ?

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Q. 'CFCs' stands for

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Q. Process involved in converting ultraviolet radiation (UV) into heat, known as

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Q. Which chemical was used as a foam blowing agents?

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Q. Chlorine free radical reacts with 'ozone' to form

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Q. What causes effects of ozone layer ?

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Q. CFCs can destroy

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Q. Which chemical is produced from a jet engine?

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Q. According to a general survey, One in five Americans would be more at risk in developing:

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Q. Bromine' is more effective in destroying CFCs than

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