Global Warming

350 is the number in parts per million that we need to bring our carbon dioxide down to in order to not die a catastrophic death. Its currently been hovering in the 380s and growing at 1-3 ppm per year. Not good, considering that prior to the industrial revolution and coal burning/car driving growth, it was at 270. An observation lab in Hawaii has been tracking it since the 60s. More at 350.org.