Types of Environmental Changes

Environment of earth includes the whole of atmosphere, hydrosphere as related to biosphere. Therefore, environment includes nature, composition of air, characters of hydrological parameters, sunshine, air pressure, temperature, water resources - their storage and flow and all other physical parameters of earth and its atmosphere.

In a broader time of scale of millions of years, many changes in these environmental parameters could be expected to have changed. But, in a start cycle 100-200 years, following changes in environment can be noticed.

1) Change in rainfall pattern - including the time and extent of rainfall in different parts of world.

2) Change in temperature within say 10-20 km height from earth's surface.

3) Changes in composition of air.

4) Changes in water resources.

5) Changes in quality / quantity of sunshine falling on earth.

All these changes could be attributed to many natural reasons as well as man-made reasons causing two major processes called

a) Green house effect

b) Depletion of ozone layer around earth.