The Wharton Grad Sensing a Fortune in the World's Most Toxic Air

  • Entrepreneur sees $30 million revenue in masks, purifiers
  • Sales of nebulizers to ease respiratory spasms are surging

A motorcyclists travels along a road shrouded in smog in New Delhi, India, on Jan. 11.

Photographer: Prashanth Vishwanathan/Bloomberg

Murky air means money for New Delhi businessman Jai Dhar Gupta.

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