GEOLOGY

Detailed explanation-1: -Detailed Solution. The correct answer is Increased agricultural productivity worldwide.

Detailed explanation-2: -Plants are blooming earlier in the spring. Mountain glaciers are melting worldwide, and snow cover is declining in the Northern Hemisphere (Learn more here and here). Greenland’s ice sheet-which holds about 8 percent of Earth’s fresh water-is melting at an accelerating rate (learn more).

Detailed explanation-3: -Some people mistakenly believe water vapor is the main driver of Earth’s current warming. But increased water vapor doesn’t cause global warming. Instead, it’s a consequence of it. Increased water vapor in the atmosphere amplifies the warming caused by other greenhouse gases.

Detailed explanation-4: -Out of the following oxygen is not a greenhouse gas because it does not trap radiations from the sun to raise the average temperature of the earth but carbon dioxide, nitrous oxide, methane etc. have created a thermal blanket around the earth trapping more heat and in turn raising the average temperature of the earth.