I guess you are right jebr, I will settle for 500 ppm, I note is was about 337 ppm in 1980.
Should Australia stop exporting coal to China ? the latter country produces 21.5% of total world carbon emissions per year, although it seems the real elephant in the room is the USA.
Maybe things will improve for the AGW worriers, now that shale gas has appeared on the scene. Shell has gone from being an oil company to a gas company
