Climate change "progress"

As if the US and European fiscal crises, with the concurrent political dysfunction, weren't enough to worry about, climate change proceeds apace, despite denial by many people. The graph below makes the point:

Atmospheric CO2 levels are rising at about 3 ppm per year, and most models suggest that somewhere around 400-450 ppm will be the tipping point for major disruptive climate change worldwide. We are rapidly approaching that point.