Forget Delhi—Loni is now the planet's most polluted city. With PM2.5 levels soaring 22 times past WHO safety limits, this urban nightmare is suffocating residents.

Loni: Global #1 rank. Delhi: Still the world's most polluted capital.

The Crisis: Industrial clusters and the "bowl effect" trap toxic smog. India holds 5 of the top 10 global pollution hotspots.