In late September 2017, Hurricane Maria devastated Puerto Rico. Shortly after the hurricane hit, more than 90 percent of the US territory lacked access to electricity. Even three months later, half of the island still did not have power, and power outages were frequent, forcing many people to rely on power generators. In a recent study, Carnegie Mellon University and University of Puerto Rico-Rio Piedras (UPR-RP) researchers showed that these generators increased air pollution in the San Juan Metro Area.