date:Nov 13, 2019
New Delhi officials declared a public health emergency on Nov. 1 as a result of air pollution nearly 20 times the levels deemed safe by the World Health Organization.
A combination of factories, Diwali fireworks, more than 8 million cars and seasonal burning of agricultural land to make room for new cropsknown as stubble burningtypically cause increased air pollution levels this time of year in New Delhi, but this year is worse than in the past.
Safe air pollution levels are between zero and 5