The simple fact that some people are making money off going green doesn't invalidate the issue. Sure, there are apt to be some snake oil salesmen, and some hype by those who want to make money but that has always been the case around every major issue or advance. In fact the possibility that industry will make some money is good - it offsets the argument from people complaining about the cost.

Even if you think this is 'fake' prudence suggests that if we err on the side of caution at worst we end up with a cleaner and less polluted planet. However if we are mistaken about the seriousness of the issue, and chose to ignore it, then we could destroy the planet.

It helps to remember we are basically floating on a rock with a thin skin of life. It is unlikely that a rescue ship will rush emergency supplies to us if we screw up.