title: Beijing pollution is becoming a "public health catastrophe," expert says.
authors: Jane
authors: J
authors: Parry
mesh_terms: D000397:Air Pollution / Q000009:adverse effects / Q000517:prevention & control / Q000706:statistics & numerical data*; D002681:China; D006801:Humans; D012905:Smog / Q000009:adverse effects
chemical_list: D012905:Smog