Tuesday, October 26, 2010

A population is all the organisms that both belong to the same species and live in the same geographical area. The area that is used to define the population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals from other areas. Normally breeding is substantially more common within the area than across the border.
The population of world is going bigger and bigger. Some population is leading us to droughts like "AFRICA".
We have to thnk ways to minimize it!!!!!!!!!!!!

Saturday, October 16, 2010

As we know the problems which are effecting our mother earth are
  • Pollution
  • Population
  • Natural disasters
and many more but one of the most highly problems now these days is Pollution. IAM going tell you what is pollution later, how to overcome them!


Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms.[1]Pollution can take the form of chemical substances or energy, such as noise, heat, or light. Pollutants, the elements of pollution, can be foreign substances or energies, or naturally occurring; when naturally occurring, they are considered contaminants when they exceed natural levels. Pollution is often classed as point source or nonpoint source pollution. The Blacksmith Instituteissues annually a list of the world's worst polluted places.