Earth’s atmosphere is a thick blanket of gases. The gases in the atmosphere block the excess heat from the sun, but allow sunlight to enter.The sunlight heats the surface of the earth. At night, this heat is emitted back into space. This natural process that warms the earth’s surface is called greenhouse effect. Carbon dioxide, methane, water vapour and Ozone are some major greenhouse gas.
An increasing in the amount of greenhouse gases in the air results more heat being trapped in the atmosphere. It leads to an overall rise in the surface temperature of the earth. This is known as global warming. The temperature of the earth has increased by about 1-2’F in the last 100 years and is continuing to increase further. If the temperature keeps in creasing , ice at the poles will melt. This will increase the water level in oceans and large areas of land will get flooded. There would be destruction all around the world.
Carbon dioxide is one of the major contributor to global warming. This is happening due to burning of wood, excessive use of fossil fuels and deforestation. Methane is a natural gas and it is another major contributor to global warming which is released from landfills, wetlands and rice paddies. Production, distribution and combustion of fossil fuels also results in the emission of methane gas. Water vapour is known to be earth’s most abundant greenhouse gas. It is responsible for 35-75% of the greenhouse effect. Surface- level ozone is another significant green house gas. Urbanisation and Industrialisation are the major causes of increase in the amounts of ozone in the air.
Carbon dioxide plays major role.