By RISHABH R. JAIN, Associated Press NEW DELHI (AP) — India's extended lockdown to curb the coronavirus outbreak has shut down schools, workplaces, industries, transport, and forced people to stay home. It also led to an unexpected bonus in the country with six out of 10 of the world's most polluted cities: cleaner air. "It is a hell of a change," said Kunal Chopra, who suffers from chronic bronchitis