Today, air pollution has reached dangerous levels in many states and cities of India, Air Quality Index 418 in Delhi, 265 in Ghaziabad, 357 in Noida, 272 in Lucknow, 404 in Hisar of Haryana, 189 in Patiala of Punjab, 207 in Jaipur. Today, AQI of 216 was recorded in Mumbai, 198 in Pune and 127 in Kolkata, which will be considered as poor and worst category air.