FYI, "It's Official: Global Carbon Levels Surpassed 400 ppm for Entire Month" http://commondreams.org/news/2015/05/06/its-official-global-carbon-levels-surpassed-400-ppm-entire-month http://research.noaa.gov/News/NewsArchive/LatestNews/TabId/684/ArtMID/1768/ArticleID/11153/Greenhouse-gas-benchmark-reached-.aspx Gerry