India, Oct. 28 -- Rain and favourable wind might have delayed the onset of winter pollution in Delhi, but air quality forecasts for the coming days suggest that the Capital is headed towards an air emergency, this newspaper reported on Wednesday. This expec-ted change in the air quality has been attributed to a spike in stubble fires and Diwali. The Indian Institute of Tropical Meteorology's said the contribution of stubble smoke in Delhi's PM 2.5 levels is expected to reach around 65% by the first week of November. The delayed withdrawal of monsoon and the heavy post-monsoon showers in October resulted in the slow start to the stubble burning season this year....