Heat-Trapping Gas Passes Milestone, Raising Fears

SUB-CLIMATE-

Click Here to Read:   Heat-Trapping Gas Passes Milestone, Raising Fears By Justin Gillis in The New York Times on May 10, 2013.

The average carbon dioxide reading surpassed 400 parts per million at the research facility atop the Mauna Loa volcano on the island of Hawaii for the 24 hours that ended at 8 p.m. on Thursday.