Pollution.

Pollution is the introduction of contaminants into the natural environment  that cause adverse change.

Pullutans, te components of pollution, can be either foreign substances or naturally ocurring contaminants.Pollution is often  classed as  point source or nopoint source pollution.

If we recycle paper, we´ll save trees. 

We´ll save electricity if we buy light bulbs.   

Cars pollute and destroy the enviroment. In 2035, the number of cars in the wolrd will be 1.200 million.

The global warming is a serious problem for humans because:

• In 100 years, the American state of Florida won´t exist because it will be under the sea.
• In the next 100 years, 50% of the world´s diferent species of animals will disappear.