Updated Dec 28, 2020 | 16:13 IST Air pollution poses the second largest risk factor for premature deaths in Rajasthan. Health cost of air pollution in Rajasthan is 1.70 per cent of the state GDP– higher than the national tally of 1.36%. Representational Image Key Highlights The analysis of real time air quality data has shown that the number of days in the ‘poor’ category of air quality index for PM2.5 has more than doubled during the 2020 winter in Jaipur Over the last three years, the frequency and duration of bad air days is increasing in Jaipur and Bhiwadi As air quality changed between summer to winter, the share of PM2.5 in the overall particulate concentration in the air rose beyond 50-70 per cent during winter