Pollution:air, water, land.

Now days on of the most dangerous problem of the society is pollution. The world is in a very critical situation because natural resources are running out, forests are disappearing, the population is growing and air and water are more polluted than ever. There are different types of pollution: air, water, acoustic... Everyday we see that the world is going to disappear. The natural atmosphere changes because of the global warming and increases in the world's temperature is caused by greenhouse effect. So many habitats of species of animals are going to disappear and they are going to extinct. Also the ices are going to melt because of global warming. The Ozone hole, that allows the ultra violet radiation from the sun to reach the earth, so we are exposed to skin cancer. Greenhouse effect, generated from carbon dioxide, produced when fuses are burned. Everyone must respect the environment because when we pollute we kill our self and we kill the world.