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प्रश्न
What are green house gases? How are they responsible for global warming?
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उत्तर
Gases that contribute to the greenhouse effect are called greenhouse gases. These gases are carbon dioxide, water vapour, oxides of nitrogen, methane, ozone, and chlorofluorocarbons. Sunlight reaching Earth consists of three types of radiation-UV radiation, visible radiation, and IR radiation. As sunlight passes through the atmosphere, most UV radiation is absorbed by ozone; 30% of IR radiation reaches the Earth's surface, heating it up. As the Earth's surface becomes hot, it starts emitting radiation with less energy than the incoming radiation and thus with a longer wavelength. Some emitted IR radiation escapes from the Earth's surface and some is absorbed by CO2, thus remaining on the Earth. Trapped radiation warms the Earth's surface and lower layers of the atmosphere.
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संबंधित प्रश्न
List two major harmful effects of the following:
Too much gaseous exhausts containing CO2 and SO2.
What is the effects of global warming?
Choose the correct option.
Global warming will _____ climate change.
State some anthropogenic (man-made) causes of global warming.
What is known as Global Warming?
Give a description of the recent studies about Global Warming.
Give a chemical test to distinguish between the following gases:
Sulphur dioxide and chlorine.
Match the items of Column A with those of Column B.
| Column A | Column B |
| (a) sulphur dioxide | (i) damage ozone layer |
| (b) carbon dioxide | (ii) reduces oxygen-carrying capacity of blood |
| (c) carbon monoxide | (iii) acid rain |
| (d) chlorofluorocarbons | (iv) green house gas |
We should plant trees and nurture the ones already present in the neighbourhood. Why?
An average increase in the temperature of the atmosphere is called acid rain.
