U.S. Geological Survey (USGS) officials said Wednesday that western Colorado has upwards of 40 times more natural gas than previously believed, making it the second largest natural gas producing formation in the U.S. The Mancos Shale formation in Colorado’s Piceance Basin, located in the western section of Colorado, nestles nearly 70 trillion (66.3 trillion) cubic feet of gas. This marks a massive uptick from the 1.6 trillion cubic feet estimated in 2003, research shows. A trillion cubic feet of natural gas, according to the U.S. Energy Department, is enough to heat 15 million homes for a year — 66. 3...