From NEERI certification and QR codes to prices and authorised markets, here's everything consumers should know before buying green crackers this Diwali. Green crackers can reduce certain emissions, but they are not pollution-free. An expert explains their benefits, limitations and the associated health risks. The prohibition applies even to green crackers and does not provide a festival-specific exemption. Districts covered include Gurugram and Faridabad, which fall within the National Capital Region.