New Delhi's half-marathon race uses UHF radio waves to improve air quality

New Delhi's half-marathon race used ultra high frequency (UHF) radio waves to clear the air for the runners on Sunday, an experimental technique the organisers hope could improve the city's notorious air quality.
 

India is home to the world's 14 most polluted cities. Last year the smoke from burning crop waste and thousands of firecrackers contributed to a toxic smog that blanketed the capital of New Delhi and a large part of northern India in toxic smog.
 

The city's Chief Minister Arvind Kejriwal warned New Delhi would face the same fate this year if Narendra Modi's ruling Bharatiya Janata Party