It has always seemed to me that the retreat of mountain glaciers around the world is one of the most compelling pieces of evidence for global warming. (realclimate.org)
While carbon dioxide is often blamed for global warming, methane is actually 85 times more potent when it comes to trapping heat. (techtimes.com)
Moreover, the case for global warming does not rely primarily on observed warming; it has models, historical studies and other science behind it. (vvattsupwiththat.blogspot.ru)