Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Doctors Warn of Pollution's Impact on Health in New Delhi Anjana Pasricha NEW DELHI -- As winter sets in, residents in New Delhi follow an unusual weather routine: People in the world's most polluted capital do not look out their windows to see whether it is a sunny or a chilly day, but to check on how bad the toxic smog that envelops the city is. This year, Nandini Guha, 65, did not wait to watch the skies turn gray and city landmarks and buildings virtually disappear under a haze of dirty air. She left the city for a few weeks before air pollution levels hit a three-year high, touching the hazardous category last week. Earlier this year, medical tests showed that Guha, a former college professor and longtime city resident, had developed asthma. "I already have been put on inhalers and on nasal sprays. I don't want to fall so sick that I have to be hospitalized," she said. .