Emissions of ozone, a smog-causing pollutant, are linked to asthma, heart disease and premature death.
Emissions of ozone, a smog-causing pollutant, are linked to asthma, heart disease and premature death. Luke Sharrett New York Times file
Emissions of ozone, a smog-causing pollutant, are linked to asthma, heart disease and premature death. Luke Sharrett New York Times file