Barry's Response - Not sure what you're getting at, Thangaraj. But the scientific community has acknowledged many times over that global warming is a concern, and that humans have likely been significant contributors.
In my Technical Education class in high school, my teacher showed this (An Inconvenient Truth) to the class. I know a lot of what was said wasn't entirely accurate, but it still did a very good job at raising awareness about global warming. I think it was good because of the awareness it raised, and not because of its accuracy.
Barry's Response - That was really the point, wasn't it.