Is this Peruvian city the most polluted on earth?

Flag Cerro de Pasco

Source BBC.

Residents of Cerro de Pasco, a city high in the Andes, say the soil is harming their children. Peru’s government has declared a health state of emergency for the region on three separate occasions, but has not accepted that mining activity is to blame…

Video by Grace Livingstone and Jasmin Souesi.