The blob on the satellite image is a rainbow of colors. An analyst digitally sharpens it and there, highlighted in red, is the source: a concrete oil pad spewing methane.
In the 75,000-square-mile (194-square-kilometer) Permian Basin straddling Texas and New Mexico, the most productive oil and gas region in the world, huge amounts of the powerful greenhouse gas escape from wells, compressor stations and other equipment.
