In this paper we study the global warming phenomena and its effect on the humanity and on the atmospheric ,also we study its causes ,harms, and how to prevent it ,that the progressing country have the great effect of causing this phenomena because of its industries and what’s causes of it , also we found that the main causes of the global warming was the greenhouse gases effect ,we find that we could reduced or prevent the global warming by encourage the agricultural of wide land of some kind of pants on the earth , and use clean fuel , or renewable energy sources to save the life on the earth