Heat-Trapping Gas Passes Milestone, Raising Fears

Chris Stewart/Associated Press

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.

By JUSTIN GILLIS

Published: May 10, 2013 

http://www.nytimes.com/2013/05/11/science/earth/carbon-dioxide-level-passes-long-feared-milestone.html

Irvin Dawid

On Fri, May 10, 2013 at 2:41 PM, Pat Carstensen <[log in to unmask]> wrote:

http://www.nsf.gov/news/news_summ.jsp?cntn_id=127897&WT.mc_id=USNSF_58&WT.mc_ev=click

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