According to a new study of satellite data, the largest concentration of methane over the USA is located in a single 'hot spot' near the Four Corners intersection of Arizona, Colorado, New Mexico and Utah. As revealed from Earth orbit, the concentration of this greenhouse gas more than triples standard ground-based estimates.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2014/09oct_methanehotspot/
