There should be no question that at no other time and no other species in the known history of this planent has done more damage that we have at this time. Global warming or not, we as humans, particuarly in the coal and oil driven world, are having a destructive effect on the earth. I think we can all agree that nobody wants to live in cities full of poluted air. We do need to change our behaviors as individuals and as a world. Regardless of the global warming/climate change debate, we do need common sense regulation and personal responsibility and action to reverse some of the damage we have caused.