Children whose developing lungs are particularly vulnerable suffer the most from air pollution. For children, breathing the air in cities with the worst pollution, such as Beijing, Calcutta, Mexico City, Shanghai, and Tehran, is equivalent to smoking two packs of cigarettes a day.

Vital Signs 1999-2000: The Environmental Trends That Are Shaping Our Future (ed. Routledge, 2014) - ISBN: 9781134192946