Lead is not a criteria pollutant, but it is a hazardous air pollutant regulated by the EPA.

Carbon monoxide binds to hemoglobin in the blood, reducing the amount of oxygen that can be carried to the heart and other organs.

Residential wood burning is not a major source of nitrogen dioxide emissions, although it can contribute to local air pollution.

Ozone can cause a range of health effects, including increased risk of asthma attacks, impaired lung function, and eye irritation.

Carbon dioxide is not a criteria pollutant regulated by the EPA under the Clean Air Act, although it is a greenhouse gas that contributes to climate change.

Particulate matter can cause a range of health effects, including increased risk of heart disease, impaired lung function, and cancer.

Natural sources are not a major source of particulate matter emissions, although they can contribute to local air pollution.

Sulfur dioxide can cause a range of health effects, including increased risk of respiratory infections, impaired lung function, and eye irritation.

Motor vehicles are not a major source of sulfur dioxide emissions, although they can contribute to local air pollution.

VOCs can cause a range of health effects, including increased risk of cancer, impaired cognitive function, and eye irritation.

Natural sources are not a major source of VOC emissions, although they can contribute to local air pollution.

Lead can cause a range of health effects, including impaired cognitive function, increased risk of heart disease, and cancer.

Natural sources are not a major source of lead emissions, although they can contribute to local air pollution.

Mercury can cause a range of health effects, including impaired cognitive function, increased risk of heart disease, and cancer.

Natural sources are not a major source of mercury emissions, although they can contribute to local air pollution.