Frackers in America’s largest oil field are letting massive amounts of natural gas spill into the atmosphere. Scientists and activists are trying to find the leaks and get them plugged before they cook the planet further. By Zachary R. Mider Five hundred miles above the Earth’s surface, the Copernicus Sentinel-5 Precursor, a satellite about the size of a pickup truck, has been circling the planet for four years, taking pictures of the atmosphere below. The satellite’s infrared sensor can see things humans can’t, and in 2019, Yuzhong Zhang , a postdoctoral fellow at Harvard, got a look at some of its first readings. Zhang was interested in methane, an invisible, odorless gas. Although carbon dioxide from […]