Across the country, air quality in big cities suffers from an onslaught of daily commuters in cars. Some government officials are tackling traffic congestion head on. New York Mayor Michael Bloomberg introduced a congestion pricing plan last year that would have discouraged automobile use and encouraged commuters to bike, walk or use mass transit. Bloombergs plan, stillborn amid fierce turf wars, would have charged a fee to drivers entering the busiest parts of Manhattan during its heaviest times of use. It was modeled closely on London's highly successful pricing plan, put in place in 2003.
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