Question 29: Which of the following best summarises the passage? A. The idea that rising CO2 is beneficial ignores the impermanence of the l...

Question 29: Which of the following best summarises the passage?

A. The idea that rising CO2 is beneficial ignores the impermanence of the land carbon sink; its recent, sharp decline represents a dangerous weakening of Earth's climate regulation, signaling a potential breakdown in planetary stability due to human impacts.

B. The denialist claim favoring CO2 overlooks the fact that Earth's vital land carbon sink, an unexpected buffer against emissions, appears to be rapidly weakening much earlier than predicted, causing significant scientific concern about its future stability.

C. Although land systems once absorbed considerable human CO2, this effect is fading; the sink's recent near-disappearance is attributed to the mounting ecological shocks from climate change, confirming earlier scientific predictions about its eventual saturation.

D. The unexpected land carbon sink that buffered emissions is diminishing faster than models suggested, according to new data, a worrying trend implying that Earth's natural buffering capacities against human impact are weaker than previously estimated.