If you are trying to explain global warming, you don't want to use opinions (what you think or what you believe). If that's the real questions, then you should try to define the phrase "global warming." I found a link that does a good job of explaining global warming. Maybe you could read it and understand it better! http://www.livescience.com/topics/global-warming/

Hello Mar: A simple internet search might be the answer. If you do that , you can find something like this: ======================================= "500 scientists refute global warming dangers" ========================================= A simple web search will lead you to the article at WND dot etc. --Warm Regards, Bruce