Among wealthy democracies, the United States ranks toward the bottom, according to Zachary Wendling, principal investigator at the Environmental Performance Index.
The United States ranks 88th on exposure to particulate matter, which Geddes called "a really good indicator for health effects from air pollution."
"For both drinking water and sanitation, the United States is performing okay in absolute terms, with about 3.3 disability-adjusted life-years lost per 100,000 people from risks due to unsafe drinking water, as compared to 6.4 for unsafe sanitation," Wendling said.
The United States has ample room to improve on air quality when it comes to other developed democracies.