My first entry this year

THE WORLD AROUND US SPEAKS ENGLISH

Our natural and social environment

1- SUSTAINIBLE DEVELOPMENT.

The sustainible development uses in a responsible way the natural resources without wasting them, so it produces a balance between the human activity and the environment impact.

I think this is very important, in order to improve our environment. 

For example: 

If we spend too much wood from the trees, animal will become extintc.