what did beijing do to control air quality index
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In Beijing, the NAQA calls for enhanced dust-control measure, curbs on private transport, stopping of outdoor activities of school children and health advisory for vulnerable groups of people when air quality index is predicted - repeat predicted - to be beyond 200 for one day. The Chinese model calls it blue alert.
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The external purification device helps to reduce emissions by filtering and restricting exhaust gas. The Beijing government has also helped with the roll-out of 200,000 new and clean energy vehicles in public transportation, so that the proportion of green commuting in central districts reached 72.1 per cent in 2017
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