<http://schema.org/about>
"Scientists have long known about the life-threatening impact of air pollution -- but up until now, tracking it globally with any accuracy had been out of reach. With new satellite-based imaging, however, researchers are getting their"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/new-map-shows-air-pollution-throughout-the-world.html>