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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Q. In 1992, a team of forty scientist, announced a record high concentration of

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Q. Depletion of ozone layer published in scientific journals, in

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Q. An increase in exposure to ultraviolet radiations, may cause

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Q. 'EESC' stands for

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Q. Which type of cancer is frequently growing in America?

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Q. Spray cans containing chemical substance known as

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Q. Troposphereic' ozone harmful effects on humans, included:

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Q. Which layer of atmosphere contains water vapors, clouds, dusts and pollution?

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Q. Nitrogen and oxygen are used for

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Q. Which energy is used, stored and transferred between the earth and its atmosphere?

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Q. Why carbon dioxide is so important in our atmosphere?

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Q. 21% of heat is reflected by

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Q. Why the sea does not heat up quickly?

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Q. The solar energy absorbed by the surface is transformed into

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