Governments and the private sector can make all the pledges they want about curbing their planet-warming emissions, but without a way to measure compliance, those promises are empty. Enter GHGSat , a Montreal-based company that has 15 satellites in orbit scanning the surface of the Earth for sources of methane, a highly potent greenhouse gas. There are other satellites that do what GHGSat is doing, but none as well. GHGSat can zoom in on a sprawling refinery or other facility and pinpoint the precise loading dock or pipe array where the emission originates, allowing technicians to quickly deploy solutions to shut down the leak. “If we told you that the problem is in something the size of a baseball stadium or an airport, that's not super helpful,” says Deepak Anand, the company’s chief commercial officer. “If I can tell you, no, no, it's at this gate, or it's at this cargo bay, you can actually take care of it.” The fossil fuel industry is taking notice.…