US: Plume Labs has recently designed a user-friendly World Air Map to help the countries monitor the progress of long or short term goals of improving the air quality in their cities. Based on real-time mapping, this tool tracks hourly changes in air quality for approx. 200 metro areas around the world. For the new map, the company has gleaned relevant data from half a million environmental measurements collected from 11,000 stations. The tool can estimate not only the extent of air pollutants in these cities, but also anticipate where the pollutants are wafting. The data obtained from World Air Map can help policymakers cut air pollution and communities take back control of their environment, the company wrote in a press release.