Explain the global warming
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=>Definition :
Excess accumulation of green house gases such as carbon dioxide, methane, nitrous oxide, ozone, CFC causes warming of earth is called as global warming.
1. Earth absorbs about 75 % of the total solar energy reaching its surface thereby increasing its temperature.
2. The gases present in the atmosphere for example ozone, methane, carbon dioxide, water vapor and chlorofluorocarbons are called greenhouse gases, they absorb some heat thereby restricting the heat to escape our atmosphere.
3.These gases add to the heating of the atmosphere and result in global warming.
4. Atmosphere traps the heat around the earth and keeps it warm.
-This is called as natural greenhouse effect because it maintains the temperature and sustains life.
5.In a greenhouse, the solar energy enters through the glass, warms the soil and atmosphere and helps in the growth of plants.
6.In return, the soil and plants emit infrared radiation, which is partly absorbed and partly reflected by the glass.
-This mechanism traps the sun’s energy in the greenhouse.
7.Carbon Dioxide which absorbs heat (as they are transparent to sunlight but not to infrared heat radiation) and is the major contributor to the global warming.
8.One of the main effects of global warming will be the rise in sea and ocean levels.
9.Many chemical compounds in the atmosphere act as greenhouse gases.
-These gases allow sunlight (shortwave radiation) to freely pass through the Earth’s atmosphere and heat the land and oceans.
- The warmed Earth releases this heat in the form of infrared light (longwave radiation), invisible to human eyes.
10.Greenhouse Gases will not let all the infrared light pass through the atmosphere. -They absorb some and radiate it back down to the Earth.
-This phenomenon, called the greenhouse effect, is naturally occurring and keeps the Earth’s surface warm.
11.These greenhouse gases are produced both by natural processes and by human activities.
-The primary ones are:
Carbon dioxide (CO2)
Methane (CH4)
Nitrous oxide (N2O)
-Industrial Gases, including hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride.
Excess accumulation of green house gases such as carbon dioxide, methane, nitrous oxide, ozone, CFC causes warming of earth is called as global warming.
1. Earth absorbs about 75 % of the total solar energy reaching its surface thereby increasing its temperature.
2. The gases present in the atmosphere for example ozone, methane, carbon dioxide, water vapor and chlorofluorocarbons are called greenhouse gases, they absorb some heat thereby restricting the heat to escape our atmosphere.
3.These gases add to the heating of the atmosphere and result in global warming.
4. Atmosphere traps the heat around the earth and keeps it warm.
-This is called as natural greenhouse effect because it maintains the temperature and sustains life.
5.In a greenhouse, the solar energy enters through the glass, warms the soil and atmosphere and helps in the growth of plants.
6.In return, the soil and plants emit infrared radiation, which is partly absorbed and partly reflected by the glass.
-This mechanism traps the sun’s energy in the greenhouse.
7.Carbon Dioxide which absorbs heat (as they are transparent to sunlight but not to infrared heat radiation) and is the major contributor to the global warming.
8.One of the main effects of global warming will be the rise in sea and ocean levels.
9.Many chemical compounds in the atmosphere act as greenhouse gases.
-These gases allow sunlight (shortwave radiation) to freely pass through the Earth’s atmosphere and heat the land and oceans.
- The warmed Earth releases this heat in the form of infrared light (longwave radiation), invisible to human eyes.
10.Greenhouse Gases will not let all the infrared light pass through the atmosphere. -They absorb some and radiate it back down to the Earth.
-This phenomenon, called the greenhouse effect, is naturally occurring and keeps the Earth’s surface warm.
11.These greenhouse gases are produced both by natural processes and by human activities.
-The primary ones are:
Carbon dioxide (CO2)
Methane (CH4)
Nitrous oxide (N2O)
-Industrial Gases, including hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride.
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Answer:
⇒ Global warming or green house effect:-
certain gases such has carbon dioxide and methane when present in sufficient amount trap the heat radiated from earth. This leads to an increase in earth's temperature. This increase in temperature of earth is known as global warming and the phenomenon is called as green house effect.
⇒ The cause of green house gases such as CO2 and CH4 is burning of fossil fuels such as coal, petroleum etc. agricultural activities and deforestation
⇒ Harmful effects:-
- Melting of ice caps of mountain and glaciers resulting in flood and rise in sea level.
- Variability in whether.
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