Advertisements
Advertisements
प्रश्न
What are green house gases? How are they responsible for global warming?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give biological reasons for the following statements:
Cutting of trees should be discouraged.
State the effect of global warming in coastal regions.
Explain the term 'global warming'. State two ways by which global warming can be reduced.
What is known as Global Warming?
Give a chemical test to distinguish between the following gases:
Sulphur dioxide and chlorine.
Which gas is chiefly responsible for global warming?
Incomplete combustion of fuel such as petrol and diesel gives
It is said, “CO2 contributes to global warming.” Explain.
The diagram' given below depicts climate change on planet Earth. Answer the following questions:
- Name the climatic phenomenon for the increase in Earth's temperature.
- Mention one reason for this warming.
- What measures can be taken to prevent this climate change?
