Why Delhi’s air pollution is so hard to fix | Explained | Bbc News India

Every winter, Delhi is engulfed in toxic smog. Despite years of pollution-control measures, the city continues to struggle with dangerously polluted air. So, why is cleaning Delhi’s air so difficult? From geography and cross-border pollution to garbage mountains and gaps in government action, the BBC’s Ishadrita Lahiri examines the challenges behind Delhi’s air pollution crisis, and what other cities have done to tackle theirs.