“Dimmer Switch” — The Discovery Files

Researchers from the Scripps Institution of Oceanography at the University of California, San Diego, sent a fleet of unmanned aerial drones through the pollution-filled skies over the Indian Ocean and achieved an important milestone in tracking pollutants responsible for dimming Earth’s atmosphere. Based on the project’s success, more drones will be used to document how humans contribute to “global dimming” and to help provide an early warning system for potential environmental disasters.