Why the heck would anyone deny climate change???? It happens over and over through out history! Why the hell to you suppose there are plants and trees within the ice of Antarctica? Where do you suppose the Grand Canyon came from? Yes, since trees give us oxygen and we seems to be getting rid of them at an alarming rate, we are going to have a bit of influence on climate change. Changing your fuel source for light bulbs and cars is not going to have much influence on the rate of change but if those trolls that want to charge you a carbon tax stop cutting away forests to build more factories to make crap... Well the nature will still change.