During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well.
Total Solar Eclipse!
A total solar eclipse will be visible from Australia early in the morning local time on 14 November. The path of totality will start in Kakadu National Park and continue across the Pacific Ocean. For more information about the eclipse, see http://www.abc.net.au/science/articles/2012/11/07/3624663.htm.
