World's most toxic air to test New Delhi again as winter approaches

Crops are burned during this season and millions of fireworks go off during the Diwali festival, usually pushing air pollution to hazardous levels

Asia’s largest economy, China, has long had a reputation for smoggy skies. But these days, neighboring India is fighting the far bigger battle with pollution: The South Asian country is home to the world’s 10 most polluted cities.
 

Outside India’s capital, New Delhi, Kusum Malik Tomar knows the personal and economic price of breathing some of the world’s most toxic air. At 29, she learned that pollution was the likely driver of the cancer growing inside in her lungs. She had never touched a cigarette. Her husband Vivek sold land to pay for her treatment. They borrowed money from