Global warming is the heating of earth’s surface, oceans and atmosphere gradually over the years because of the human activity of burning fossil fuels. For understanding global warming we should understand the two terms fossil fuels which are being burnt by the humans and increasing of greenhouse gases in the atmosphere.
Coal, crude oil, and natural gas are different fossil fuels .They were formed from the buried remains of plants and animals that lived years ago and not completely decomposed. These fossils have high carbon content and burning these fuels causes air pollution and greenhouse gases.
The major greenhouse gases in the atmosphere are water vapor, carbon dioxide, methane, and ozone.When the Sun's rays reaches the atmosphere, some of it is reflected back to space and the rest is absorbed and re-emitted by the greenhouse gases.The absorbed sunlight warms the atmosphere.This is the greenhouse effect.Global warming is caused by this greenhouse effect.Global warming is resulting in the increase in the temperature and climatic changes.
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