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प्रश्न
Discuss harmful effects of greenhouse effect.
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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
What was the ancient belief regarding the nature of matter ?
Mention five causes of air pollution.
Write ‘true’ or ‘false for the following;
Air is a compound.
Describe a simple experiment with the help of a diagram to show that Air has mass
While freezing, the ______ of water is lowered.
______ soil has pH 7.
Water does not have a ______ but has definite ______ and ______.
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
Draw a neat labelled diagram for the following experiment.
To prove that oxygen is non-combustible, but supports combustion.
The composition of air is always exactly the same.
