I am not saying I do not trust Gore. I wonder why so many scientists do not believe in global warming.

The data produced in lab definitely say that carbon dioxide absorbs infrared radiations and warm up the environment. Do scientists believe that the data produced in labs may not always be extrapolated in the real world environment?  or, Some scientists may think that it is hard to correlate temperature rise with carbon dioxide rise- simply because there are so many factors playing together at the same time ( for example sun might have effect on it ).