Delhi air quality slightly improves but still in 'very poor' category

The Air Quality Index (AQI) was 311 --'very poor'-- at 8 am, according to the state-run SAFAR

Delhi's air improved slightly on Monday but was still polluted as property developers moved the Supreme Court against its order to re-impose the ban on construction activities in the national capital. 

The Air Quality Index (AQI) was 311 --'very poor'-- at 8 am, according to the state-run System of Air Quality and Weather Forecasting And Research (SAFAR). Readings below 50 are considered safe, while anything above 300 is considered hazardous or 'severe'.

The Developers and Builders Forum, a body of more than 60 builders, filed a plea in the apex court, and contended that they use the latest construction