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प्रश्न
Discuss harmful effects of greenhouse effect.
उत्तर
Large amount of carbon-dioxide in the polluted air results in increase of greenhouse effect which has raised the average temperature of the Earth by 2°C. This results in global warming which, in turn, will melt ice on the polar caps, thereby raising the level of sea water by a few metres. This can result in submerging of coastal areas and islands causing excessive damage.
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संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
How is greenhouse effect produced?
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Mention five causes of air pollution.
Name two air pollutants which cause acid rain.
Draw a neat labelled diagram for the following experiment.
To prove that oxygen is non-combustible, but supports combustion.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Name a device which uses wind energy to generate electricity.
What is wind energy?
The composition of air is always exactly the same.
