Hong Kong , China ( CNN ) -- Air pollution reaches near-record levels , Hong Kong government says . The World Health Organization said Monday that air quality in the city is among its worst ever and warned of a public health crisis as Beijing tries to clean up smog.
Air pollution reaches near-record levels , Hong Kong government says . The World Health Organization said Monday that air quality in the city is among its worst ever and warned of a public health crisis as Beijing tries to clean up smog.