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प्रश्न
Write a short note on the greenhouse effect.
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उत्तर
- The greenhouse effect is a natural phenomenon that keeps the Earth warm at normal levels by forming a blanket of gases in the atmosphere.
- This blanket of gases, including water vapour, CO2, and methane (CH4), allows sunlight to pass through but prevents solar radiation from escaping back into space.
- It is essential for life because, without this effect, the earth’s average surface temperature would be a chilly −18°C instead of the current 15°C.
- However, human activities like burning fossil fuels and deforestation are making this gaseous blanket thicker, resulting in an enhanced greenhouse effect known as global warming.
संबंधित प्रश्न
Match the items given in columns A and B:
| Column ‘A’ | Column ‘B’ | ||
| (a) | Catalytic converter | (1) | Particulate matter |
| (b) | Electrostatic precipitator | (2) | Carbon monoxide and nitrogen oxides |
| (c) | Earmuffs | (3) | High noise level |
| (d) | Landfills | (4) | Solid waste |
What measures as an individual would you take to reduce environmental pollution?
Explain industrial melanism.
How does a desert plant adapt to the dry, warmer environmental conditions ?
When there is excessive sweating, retains water with the help of ______.
Assertion(A): Urbanisation is one of the environmental issues.
Reason(R): As the town expands, it mounts more pressure on transport system, water supplies leading to air pollution, water pollution, etc.
How can we conserve forests?
Which of the following environmentaiists first gave the concept of Biodiversity hotspots?
Pollutants resulting from human activities are mainly discharged in ______.
The term 'Terror of Bengal' is used for______.
