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22 March 2016

Cities improve air quality and public health by banning cars

Air pollution caused by traffic is major health problem in Indian cities
India:Traffic jams cause air pollution

In January 2016, Delhi [India] conducted a 2-week  air pollution reduction experiment, with private cars allowed on the streets only on alternate days, depending on license plate numbers.   The idea is not new and has been tried elsewhere (Paris and Rome) but I guess its novelty (“who’d have thought” brigade) to the USA explained why it made The New York Times! 

Last year, it was all headlines about Bejing [China] and the air quality citizens had to deal with. However it would seem that actually Beijing’s levels of PM10 (particulate matter up to 10 micrometres in size), a measure of air quality, decreased by 40% from 2000 to 2013, whereas Delhi's PM10 levels have increased 47% from 2000 to 2011.

Delhi's PM10 levels are nearly twice as much as in Beijing, and that explains the license plate experiment.

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