Pollutant

Source

Human Health Effect

Particulate Matters

Internal combustion engines; industry; mining

Lung disease/cancer

Motor vehicles; burning wood; cigarette smoke; bushfires

heart disease; asthma

Lung/respiratory disease

NO₂

Motor vehicles; other combustion

Asthma; increased mortality

Increased hospital admission

CO

Motor vehicles; industry

Increased mortality

burning of coal, oil, and wood; waste incineration

SO₂

Fossil fuel combustion; industry

Bronchoconstriction; asthma;

Increased hospital admission

O₃

Reaction between oxides of nitrogen and volatile organic compounds

Industry; Motor Vehicle exhaust; gasoline vapors

Lung diseases, asthma