Smog chokes Indian capital as pollution hits hazardous levels

By Tommy Wilkes NEW DELHI (Reuters) - Residents of New Delhi woke up to a blanket of smog on Monday as air quality deteriorated sharply overnight in India's capital, triggering warnings that even healthy people were at risk of respiratory problems. New Delhi ranks among the world's most polluted cities, with air quality usually worsening at this time of year, when smoke from firecrackers celebrating the Hindu festival of lights and crops burnt in nearby states envelops the city of 16 million. Yo