Published September 26, 2011, 12:56 PM
Air pollution: U.S., Canada cities among best; Iran, India, Pakistan cities worst
The World Health Organization released the list to highlight the need to reduce outdoor air pollution, which is estimated to cause 1.34 million premature deaths each year. The global body said investments to lower pollution levels quickly pay off due to lower disease rates and, therefore, lower healthcare costs.By: Associated Press,
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