The problem with global warming is that people have turned it into a religion. Yes, we are doing a lot of stupid stuff. Yes, we should work to reduce our impact on the planet. No, we do not have conclusive evidence on what is going to happen. We have models that seem to point at something bad happening. They are probably directionally correct. We can't predict the future. If someone in 1900 had predicted what the next 100 years would be like, they would have missed all of the major events in the century. We aren't any different than the people 100 years ago.