U.S. readings show ` ` hazardous '' air while Canada reports ` ` slight . '' China 's readings do not include fine air . China 's state - run media expresses distrust over official smog data . While pollution is an ongoing concern in the country , the weather in recent days has made matters worse , said CNN International weather anchor Mari Ramos . China 's weather has compounded the problem in recent days .
U.S. readings show ` ` hazardous '' air while Canada reports ` ` slight . '' China 's readings do not include fine air . China 's state - run media expresses distrust over official smog data . China 's weather has compounded the problem in recent days .