What do you know about the criteria air pollutants? Check the statements you believe to be TRUE. Lead is persistent in the environment and can be added to soils and sediments through deposition from
sources of lead air pollution.
Once inhaled, particulate matter can affect the heart and lungs and cause serious health effects.
Ozone at ground level is a harmful air pollutant and it is the main ingredient in smog.
CO is a colorless, odorless gas that can be harmful when inhaled in large amounts. CO is released when
something is burned. The greatest sources of CO to outdoor air are vehicles or machinery that burn fossil
fuels.
NO2 and other NOx interact with water, oxygen and other chemicals in the atmosphere to form acid rain.
SOx can react with other compounds in the atmosphere to form particulate matter pollution: particles may
penetrate into the lungs and cause health problems.