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1.Which of the following is responsible for depletion of ozone layer?(a) smog(b) carbon monoxide (c) nitrogen dioxide(d) chlorofluorocarbon ​

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ANSWER:

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Explanation:

CHLOROFLUOROCARBONS (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The TOTAL amount of EFFECTIVE halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).

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