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Which of the following regions is most likely to show a reduction in COβ‚‚ absorption capacity during strong El NiΓ±o years, as highlighted by WMO reports?

1. Amazon Basin


2. Central Pacific Ocean


3. Siberian Taiga


4. Congo Rainforest
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With reference to atmospheric carbon dioxide (COβ‚‚) dynamics, which of the following statements are correct?

1. In 2024, the global average COβ‚‚ concentration rose by about 3.5 ppm over the previous year β€” the highest single-year increase since systematic records began.


2. About 50 % of anthropogenic COβ‚‚ emissions are absorbed by natural sinks (oceans, forests, soils), but their capacity is declining under climate stress.


3. COβ‚‚ is a short-lived greenhouse gas in the atmosphere, with an average lifetime of a few years, hence its effect diminishes quickly.


4. Increased wildfires, such as in the Amazon, contribute to net positive COβ‚‚ addition due to both combustion and reduced uptake by stressed vegetation.
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Which of the above statements are correct?
Anonymous Quiz
41%
1, 2, and 4 only
20%
1 and 3 only
21%
2, 3, and 4 only
19%
1, 2, 3, and 4
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