World health organization

10 facts on children's environmental health

A girl cooks on an indoor stove
WHO/C. Gaggero

More than 50% of the 1 million annual child deaths from acute respiratory infections are attributable to indoor air pollution

Indoor air pollution often is caused by the burning of solid fuel to cook . Acute respiratory infections – in particular pneumonia – are the leading killer of young children. Second-hand tobacco smoke is another major risk factor. Children in developing countries are especially at risk due to poor housing conditions.

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