Greenhouse gases en Martian Mystery: How Water Could Have Flowed on Chilly Mars <p><span style="line-height: 1.5;">A University of Washington researcher may have </span><a href="" style="line-height: 1.5;" target="_blank">helped solve a Martian mystery</a><span style="line-height: 1.5;">&nbsp;by</span><span style="line-height: 1.5;">&nbsp;explaining how the chilly surface of Mars could have once flowed with water.</span></p> Wed, 27 Nov 2013 23:10:42 +0000 Gabriel Spitzer 11328 at Martian Mystery: How Water Could Have Flowed on Chilly Mars Bill McKibben of to Lead Climate Change Rally in Seattle <p><span style="line-height: 1.5;">This Saturday, environmental activist and author Bill McKibben</span><span style="line-height: 1.5;">&nbsp;will lead a rally&nbsp;</span><span style="line-height: 1.5;">against fossil fuel exports and the Keystone XL pipeline in Seattle.&nbsp;</span></p><p><span style="line-height: 1.5;">Known as one of the first voices to warn of the dangers of global warming,&nbsp;McKibben is on tour with his new book, <a href="" target="_blank">Oil and Honey</a></span><span style="line-height: 1.5;">. He</span><span style="line-height: 1.5;">&nbsp;is also the founder of an international organization called <a href="" target="_blank"></a>, which he created to fight climate change.&nbsp;</span></p><p>McKibben says 350 is "<span style="line-height: 1.5;">the most important number in the world, but nobody knew it until 2008,&nbsp;</span><span style="line-height: 1.5;">when Jim Hansen and his team at NASA published a paper saying we now know enough about carbon to know how much in the atmosphere is too much."&nbsp;</span></p><p> Fri, 20 Sep 2013 12:01:00 +0000 Bellamy Pailthorp 10060 at Bill McKibben of to Lead Climate Change Rally in Seattle EPA creates Website to ID biggest emitters of greenhouse gases Ever wondered who the big greenhouse-gas emitters are in your neck of the woods? The answer is now just a click away.<p>The US Environmental Protection Agency today <a href="" target="_blank">unveiled a new website</a> that identifies most of the nation's biggest emitters of carbon dioxide, methane and other greenhouse gases. It lets you, for example:<p>-- Click near Macon, Ga., and home in on the nation's largest single-point source of greenhouse gases: the Scherer power plant (actually four huge coal-burning facilities). Wed, 11 Jan 2012 21:05:50 +0000 Richard Harris 3682 at