The AQI crossed 700 (a value above 150 is considered unhealthy) in many parts of the NCR on Thursday, forcing the shutting down of primary schools. Over a dozen companies including Deloitte, KPMG, Panasonic, BigBasket, BluSmart, Zepto and CIEL HR Services that ET spoke with said they are taking initiatives include offering work-from-home options to employees, providing masks at offices and to frontline staff, installing air purifiers and indoor plants as well having a doctor on call.