New Mexico’s two biggest energy-producing regions are two of the most-polluted in the nation when it comes to methane emissions, according to a study released today. Both the San Juan Basin and the Permian Basin rank as the third and fourth most methane polluted regions in the country, according to the Washington D.C.-based progressive think tank Center for American Progress’ “The Who’s Who of Methane Pollution” report. The report is based on 2014 data from the federal Environmental Protection Agency. The San Juan Basin, located mostly in northwestern New Mexico, emits the most methane per well in the country. Methane emissions are commonly viewed as a greenhouse gas more harmful than carbon dioxide and the report underlines this point and pushes the federal government for strong regulations limiting them.