Effects on the Atmosphere and Climate

Changes in Air Quality

Human activities release a wide range of emissions into the environment including carbon dioxide, carbon monoxide, ozone, sulfur oxides, nitrogen oxides, lead, and many other pollutants. Some of these emissions are toxic and have claimed many lives in some cities when concentrations reached dangerous levels as in the "killer smogs" of London in the 1950s and 1960s. Others emissions such as carbon dioxide, act to trap heat in cities. Cities also release quantities of dust into the atmosphere, with effects like those mentioned next.

Streaming Quicktime Movie (click image to play):

Cough, cough!


created 3/9/2002; last revised 5/1/2002 - Matt Kuhn & Andreas von der Dunk