Air Pollution at National Parks Keeps Visitors Away
THURSDAY, July 19, 2018 (HealthDay News) -- Fresh air is in short supply at U.S. national parks, a new study shows.
Researchers found that from 1990 to 2014, average concentrations of ozone air pollution in 33 of the nation's largest national parks were the same as in the 20 largest cities in the country.
Despite improvements over the last two decades, the air quality in many national parks is unhealthy for sensitive people an average of almost three weeks a year, the researchers noted.
Exposure to elevated ozone levels can put people at risk for respiratory problems, hospitalization and even death for sensitive people, the study authors said.Full Article