Consider the following statements regarding depletion of the

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ESE 2018 Prelims Paper I
Engineering aptitude
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Engineering aptitude

43

M: +2.00/-0.66

Consider the following statements regarding depletion of the ozone layer:
1) Excessive release of chlorine and bromine in the environment from man-made compounds, such as chlorofluorocarbons.
2) Occurrence of certain natural phenomena such as sunspots, and stratospheric winds.
3) Degradation of materials by ultra-violet radiation.
4) Major volcanic eruptions.
Which of the above can be categorized as causing ozone depletion?

[ESE 2018 Prelims Paper I]

A 1, 2 and 3 only

B 1, 3 and 4 only

C 1, 2 and 4 only

D 2, 3 and 4 only