Solar energy revolution hits barrier: Air pollution

An extremely dusty solar panel stands on a rooftop at the Indian Institute of Technology. Researchers Michael Bergin of Duke University and Chinmay Ghoroi of the Indian Institute of Technology-Gandhinagar, pictured, looked closer into the cumulative effect of dust on worldwide solar panel efficiencies in a new study. Michael Bergin, Duke University
Solar energy is running into a pesky problem: air pollution worldwide.
Researchers from Duke University found that air pollution — specifically