Guess those ZEV and other credits will be around for a while- Atmospheric CO2 Concentrations Surpass 400 PPM Milestone "Atmospheric concentrations of carbon dioxide surpassed a notable milestone this week. They reached a daily average above 400 parts per million, reported NOAA, for the first time in human history."
Last time we had that kind of concentration, the sea level might have been 60 to 80 feet higher. Scary stuff! Carbon Dioxide Level Passes Long-Feared Milestone - NYTimes.com