Ahead of Diwali, the politics over pollution seems to have heated up once again in the national capital. Like every year, Delhiites are expecting a spike in Air Quality Index following the festival of Diwali. Despite widespread social awareness campaigns by the government as well as the social sector, every year Diwali in Delhi sees worsening air quality - in part due to the bursting of harmful and pollution-causing firecrackers and in part due to agrarian practices like stubble burning in nearby states. The onset of winter also acts as a cause for spike in air pollution in the NCR region at this time.