Discuss briefly the following:
Greenhouse gases

Explanation

Greenhouse gases
Water vapour, Carbon dioxide, Methane, Nitrous oxide, Ozone, Chlorofluorocarbon and Hydrofluorocarbon are the major Green house gases. When sun rays fall on the earth, a part of it is reflected back to space. But this is absorbed by the green house gases. They act like a thermal blanket and keep the earth warm. Without the greenhouse effect, the earth will have a temperature as less as `18^(@)c`. This is a natural phenomenon .