Alaska Hawaii n2o is also a very important green house gas...Here is the map of its rise...It hit 224 ppt Here is a page of all the goodies for us green house gas trackers!!! Forcing charts too! YAY!!! NOAA/ESRL Global Monitoring Division - THE NOAA ANNUAL GREENHOUSE GAS INDEX (AGGI) n2o has .173 of the 2.770 watts/meter^2 as of 2009, while co2 has 1.760 watts/meter^2 as of 2009...I'm sure it is at least 1.79 for 2010 when it is updated or maybe 1.80! DAMN I WISH THEY HAD SOMETHING LIKE THIS FOR METHANE! That is what is important right now.