Michael Bloomberg gifts Sierra Club $30M to fund anti-coal efforts
April 8, 2015, 11:28 a.m. by Michael d'Estries
Billionaire philanthropist and former mayor says he's 'doubling down' on efforts to reduce carbon emissions and to replace half the nation's coal with clean energy by 2017.
Leaked U.N. report warns of 'irreversible' warming
August 27, 2014, 4:45 p.m. by Russell McLendon
The risk of 'severe, pervasive and irreversible impacts' is quickly rising worldwide, the draft report warns.
Earth is about to reach another terrible CO2 milestone
April 29, 2014, 12:42 p.m. by Russell McLendon
Last year, CO2 in Earth's air hit 400 ppm for the first time in human history. Now it's poised to average 400 ppm for a month.