The reduction in the amount of chlorofluorocarbons (CFCs) released into the air has the greatest positive effect upon

Water pollution

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Noise pollution

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Acid rain

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Global warming

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Solution

The correct option is D Global warming
$C O_{2}$ molecules in atmosphere contribute to greenhouse effect. So, $C O_{2}$ is called as a greenhouse gas. Besides carbon dioxide, other greenhouse gases are methane, water vapour, nitrous oxide, CFCs and ozone. Green house gases causes global warming. Hence, if the amount of CFCs released into air will be decreased, it has positive effect on global warming.

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Similar questions

Name one source and one harmful effect of each of the following air pollutants :

(a) Sulphur dioxide

(b) Nitrogen oxides

(d) Chlorofluorocarbons (CFCs)

Which of the following will reach the earth in greater amounts if the amount of chlorofluorocarbons released into the air increase?

(a) Infrared rays

(b) X - rays

(d) Ultravilolet rays

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