An environmental advocacy group has ranked Saguaro National Park as one of the country’s worst when it comes to air pollution.
A report by the Washington D.C. based National Parks Conservation Association shows high levels of ozone in the area have led to a roughly 40 percent reduction in visibility in and around the park.
Using several government environmental data sources, the group ranked Saguaro as the 12th worst.
Also on the list is Carslbad Caverns in New Mexico, which ranks fifth and California’s Sequoia National Park taking the top spot.
