Given below are two statements. In the light of the above statements, choose the correct answer from the options given below.
Statement I:The concentration of Chlorofluorocarbons (CFCs) in the atmosphere has increased in the past few years.
Statement II:CFCs already present in the atmosphere will persist for many years.
ABoth Statement I and Statement II are true
BBoth Statement I and Statement II are false
CStatement I is true but Statement II is false
DStatement I is false but Statement II is true ✓ Correct
Correct answer: (D) Statement I is false but Statement II is true
Explanation
Statement 1 is false while Statement 2 is true, reflecting the effect of the Montreal Protocol.
Statement 1 fails, since atmospheric CFC concentrations have been falling, not rising, after their phase-out.
Statement 2 holds, since CFC molecules already aloft survive for many decades.
Their long lifetime means ozone recovery will be slow despite reduced emissions.
CFCs drift into the stratosphere, where sunlight frees ozone-destroying chlorine.
The ozone layer is projected to heal only by mid-century.
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