External Link - Source: Science
It’s all fine and good to sign a climate treaty, but how do you know whether a country is keeping its word? Track it from space. Researchers have shown that observations by Earth-orbiting instruments can be used to estimate carbon dioxide (CO2) emissions from individual power plants. NASA’s Orbiting Carbon Observatory 2, which was launched in July 2014, was designed to monitor the movement of CO2 in and out of ecosystems worldwide.