Sipping 'oxygen cocktail' to cope with smog in Mongolia

Ulan Bator is among the world's most polluted cities. The Mongolian capital topped New Delhi and Beijing as the world's most polluted capital in 2016, said Unicef in a report. Worried and desperate residents have resorted to drinking 'lung' tea and so-called 'oxygen cocktails' that manufacturers claim are anti-smog products even though the WHO says there’s no evidence the products actually work.