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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.
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संबंधित प्रश्न
Since October 02, 2014 “Swachh Bharat Abhiyan” has been launched in our country.
- Write your views on this initiative giving justification.
- As a biologist name two problems that you may face while implementing the programme in your locality.
- Suggest two remedial methods to overcome these problems.
List all the wastes that you generate, at home, school or during your Trips to other places, could you very easily reduce? Which would be Difficult or rather impossible to reduce?
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 |
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.
The range of normal human hearing is in the range of ______.
Which of the following environmentaiists first gave the concept of Biodiversity hotspots?
Which among the following chronic lung disease commonly known as 'black ling' disease, leads to reduced life expectancy in coal- minerals ?
Example of secondary pollutants.
Match the following and choose the correct option.
| Column I | Column II |
| A. Environment Protection Act | i. 1974 |
| B. Air Prevention & Control of Pollution Act | ii. 1987 |
| C. Water Act | iii. 1986 |
| D. Amendment of Air Act to include noise as an air pollutant | iv. 1981 |
The correct match is:
Match the following and choose the correct option.
| Column I | Column II | ||
| A. | Environment Protection Act | i. | 1974 |
| B. | Air Prevention & Control of Pollution Act | ii. | 1987 |
| C. | Water Act | iii. | 1986 |
| D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |
