Major cities across the United States are affected by human activities that contribute to hazardous tropospheric ozone. Some cities are affected more than others based on both environmental conditions and city characteristics. The table provides information about the 2018 tropospheric ozone in four major cities in the United States as well as the environmental conditions and population density. (e) Identify one atmospheric pollutant that would likely be present at higher concentrations in areas such as Phoenix or Los Angeles and explain why the concentrations would be higher in those cities. (f) Describe one way that residents in Los Angeles could reduce the number of days per year that hazardous levels of tropospheric ozone are present.

Major cities across the United States are affected by human activities that contribute to hazardous tropospheric ozone. Some cities are affected more than others based on both environmental conditions and city characteristics. The table provides information about the 2018 tropospheric ozone in four major cities in the United States as well as the environmental conditions and population density. (e) Identify one atmospheric pollutant that would likely be present at higher concentrations in areas such as Phoenix or Los Angeles and explain why the concentrations would be higher in those cities. (f) Describe one way that residents in Los Angeles could reduce the number of days per year that hazardous levels of tropospheric ozone are present.