ECOLOGICAL CRISIS

 CLIMATE CHANGE:
The climate change is the most important problem of the world.
Now, we are detroying the ozone layer with the CFC and the gases of the vehicles.
Ozone layer will gradually refine and much larger hole.

The sun insides in the earth and the heat does not come out.
This effect is known as greenhouse effect.

Now we can see a video:
https://www.youtube.com/watch?v=2U_FznW-n-U

Bye