GEOLOGY

Detailed explanation-1: -Reforestation is the activity among these four options that does not contribute to global warming. It is the act of planting more trees and restoring the forest and woodlands. It mitigates global warming by enhancing biological process thru reduction carbon dioxide, a greenhouse gas that affects global warming.

Detailed explanation-2: -Acetylene doesn’t trap the heat that enters the Atmosphere like other Green House gases such as Methane, Carbon dioxide, Sulphur etc. hence, it doesn’t contribute to Global Warming.

Detailed explanation-3: -Burning fossil fuels, releasing chemicals into the atmosphere, reducing the amount of forest cover, and the rapid expansion of farming, development, and industrial activities are releasing carbon dioxide into the atmosphere and changing the balance of the climate system.

Detailed explanation-4: -When deforestation occurs, much of the carbon stored by trees is released back into the atmosphere as carbon dioxide, which contributes to climate change. In the last decade, the largest amounts of deforestation occurred across the humid tropics, mostly in Africa, followed by South America.