On a cold winter night, you would have snuggled under a blanket to keep yourself comfortably warm.Imagine if someone were to cover you with a dozen blankets?It would get very HOT!If you have experienced this,you will understand global warming better.
Earth is surrounded by a mixture of gases called atmosphere.A few of these,called the greenhouse gases(water vapour,carbon dioxide,methane,nitrous oxide) have the ability to trap heat.
Just as a blanket keeps you warm,the greenhouse gases make the Earth warm.Without this warmth,the earth would be too cold for us to live on./However when there is too much of greenhouse gases in the atmosphere,the earth becomes too hot! This overheating of the earth due to excess of greenhouse gases is called global warming.
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