It's a tragedy that so many so called intellectuals want to stifle any debate by labeling people "climate change deniers" in the first place. I fully believe that there is enough evidence that we need to take immediate action but exactly how human activity is impacting the environment is far from understood. To pretend that anyone knows exactly what's going on, or even if the changes we have measured in recent years are with out a doubt human caused, is BS, even if there is significant evidence pointing in that direction.