Concept:The greenhouse effect is a natural process where certain gases trap heat from the sun, keeping Earth warm. Carbon dioxide (CO₂) is the main greenhouse gas, responsible for about 56% of the absorption of radiation.
Explanation:Global warming means the average temperature of Earth's surface, air, and sea is rising.
This happens when the amount of greenhouse gases like CO₂ increases in the atmosphere.
More CO₂ traps more heat, strengthening the greenhouse effect and leading to a warmer planet.
The table below shows how much radiation each greenhouse gas absorbs:
Clearly, CO₂ absorbs the most heat. Therefore, an increase in CO₂ directly causes more global warming.
Answer:Increase in carbon dioxide (Option B).
