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As millions of people in Asia choke under polluted skies, authorities have turned to water-dispersing drones and outdoor air purifiers to improve air quality, while companies have tried to cash in by selling everything from canned air to lung-purifying teas.
Mexico’s government ordered schools in and around Mexico City to be closed on Thursday in an extraordinary step taken due to elevated levels of pollution in the smog-wreathed capital.
The household emissions from cooking, space heating, water heating and lighting are responsible for as much as 30 per cent of the annual PM 2.5 exposure, according to modelling studies jointly conducted by scientists from IIT Delhi, University of California, Urban Emissions and University of Illinois at Urbana.