Air pollution episode

An air pollution episode is an unusual combination of emissions and meteorology - usually low or stagnant winds and temperature inversion - that creates prolonged and widespread air pollution lasting two to seven days. Effects range from eye irritation to deaths across age groups. Examples of air pollution episodes include:
 * 1930 Meuse Valley Episode
 * 1939 Saint Louis Episode
 * 1948 Donora Episode
 * 1952 London Episode
 * 1997 Indonesian forest fires Episode
 * 2005 Malaysian Haze Episode
 * 2006 Southeast Asian Haze Episode
 * 1984 Bhopal Gas Tragedy Episode