What is the phenomenon of the gradual increase in average temperature of Earth's atmosphere is known as?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Global Warming
Option (1) Green House Emission — Incorrect. Gases such as carbon dioxide, methane and hydrofluoro carbons are greenhouse gases. Their emission is the cause of the rise in temperature.
Option (2) Global Warming — Correct. Global warming is the rise in global temperature, which may have catastrophic consequences for life on Earth. Greenhouse gases are considered at least partly responsible for it.
Option (3) Depletion of Fossil Fuels — Incorrect. This is the using up of coal, oil and natural gas, which cannot be renewed. It is about the supply of these resources.
Option (4) Pollution — Incorrect. Pollution is the fouling of air, water and land by harmful substances. It is a much wider idea and does not name the rise in the earth’s average temperature.
NCERT (2026-27): “Common but Differentiated Responsibilities … The Kyoto Protocol is an international agreement setting targets for industrialised countries to cut their greenhouse gas emissions. Certain gases like Carbon dioxide, Methane, Hydrofluoro carbons etc. are considered at least partly responsible for global warming - the rise in global temperature which may have catastrophic consequences for life on Earth. The protocol was agreed to in 1997 in Kyoto in Japan, based on principles set out in UNFCCC.” |