Today is the Blog Action Day on Climate Change. We must limit our time above 350. That is 350 parts per million of Carbon dioxide in the atmosphere.
It is time for urgent action: "Continued growth of greenhouse gas emissions, for just another decade, practically eliminates the possibility of near-term return of atmospheric composition beneath the tipping level for catastrophic effects."
October 24th 2009 is the day planned for mass promotion. check out the link and put in a few minutes if you can.