It is undeniable that the world at the present time has had changed into modern society, and the world is facing a global warming issue, nowadays, resulting in some persons think that improved countries around the world play a dramatic role on solving these issues rather than unimproved countries, while others claim that the best way for protecting the environment is the cooperation together of all countries. From my point of view, I think that human activities of all countries are the main cause of this problem. In the following paragraph, the reasons to support my opinion will be outlined in the detail.