Global Warming Definition
Global warming is a gradual increase in the average temperature of the earth's lower atmosphere as a result of:
- Decrease in greenhouse gases
- Increase in greenhouse gases since the Industrial Revolution — Correct Answer
- Increase in oxygen levels
- Decrease in carbon dioxide levels
Explanation:
Correct Answer Explanation
Global warming is a gradual increase in the average temperature of the earth's lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution.
Key Points:
- It is caused by man-made increases in carbon dioxide and other greenhouse gases.
- Main causes: burning of fossil fuels and deforestation.
- CO₂ concentrations increased by 31% and CH₄ by 149% above pre-industrial levels since 1750.
- Atmospheric temperature rose by 1.1°F (0.6°C) in the past century.
Why Other Options Are Wrong
- A, C, D: Global warming is caused by increase (not decrease) in greenhouse gases.
📚 About this Topic — CH-7: ENVIRONMENT AND SUSTAINABLE DEVELOPMENT
This multiple choice question is from CH-7: ENVIRONMENT AND SUSTAINABLE DEVELOPMENT, Indian Economic Development, NCERT Books. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from CH-7: ENVIRONMENT AND SUSTAINABLE DEVELOPMENT to strengthen your preparation.
