The sun sends ultraviolet rays, hit the earth and bounces, later hit with a "capa" and hit another time the earth and it sobrewarms up. -->-->-->-->

this is in 90% the fault of the human, because we contaminated too much, and this can't follow "thus".

The experts scientists says: if we don't stop now to contaminated, the earth temperatur it increased 5 degrees in the next 50 years, the polar helmets going to defrost in short time.

Credits: T.v. informative and www.google.es