THe US Supreme Court made a recent decision in which they determined that CO2 is a pollutant. This scientifically ignorant decsision is distressing to me, and gives me some concern about the future of our Democracy. Life on Earth as we know it could not exist without CO2 in the atmosphere. Many people seem to not realize that all of the plant life we see around us, trees, grass, animals, etc. are comprised of carbon taken from the atmosphere. I have seen estimates that life could not exist as we know it with CO2 levels of 160 ppm (the pre-industrial level is generally thought to have been 240 ppm). Plants do better as the CO2 level increases with levels of 1000 ppm used in greenhouses. Here is a video showing how the increased CO2 levels in recent times have greened the desert in China.

http://www.youtube.com/watch?v=Nkma7RO4Q24&eurl=http://www.co2science.org/education/truthalerts/v11/chinagreening.php