Climate refers to the weather conditions prevailing in
an area measured by assessing the patterns of variation in temperature, humidity, atmospheric pressure, wind, precipitation,
atmospheric particle count and other meteorological variables
over long periods of time.
Climate
change by definition is therefore
a large scale and long term shift in the statistical distribution of these weather patterns. Of all the long term changes
in weather pattern, increase in temperature has attracted a global attention.
The earth contain greenhouse
gases namely Water-vapour (H2O) Carbon dioxide (CO2),
Methane (CH4), Nitrous oxide (N2O),
Ozone (O3) and Chlorofluorocarbons (CFCs).
When sunlight reaches the surface of the earth, some
of it is absorbed by the greenhouse gases and are then redirected back towards
the earth to warm it. This process is called greenhouse effect. Without the greenhouse effect, the earth would be would a very cold place much than
it is now and life would be difficult.
