Paper 1 · People, Development and Environment
UGC NET December 2021 June 2022 (09.07.2022) Shift-I
Since the start of the Industrial Revolution, the acidity of the ocean's surface water has
AIncreased by about 10 percent
BRemained constant
CDecreased by about 25 percent
DIncreased by about 30 percent ✓ Correct
Correct answer: (D) Increased by about 30 percent — Ocean surface acidity has increased by about 30 percent, so option D is correct.
Explanation
★Ocean surface acidity has increased by about 30 percent, so option D is correct.
★The oceans absorb a large share of the extra carbon dioxide from human activity.
★Dissolved carbon dioxide forms carbonic acid, lowering the water pH.
★Since the Industrial Revolution, surface acidity has risen by roughly 30 percent.
★This process is called ocean acidification.
★It harms corals, shellfish, and other organisms that build calcium carbonate shells.
★Acidification is a direct consequence of rising atmospheric carbon dioxide.
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