Gurugram, Jan. 21 -- Despite restrictions of Graded Response Action Plan stage 3 in place, residents across Gurugram continue to report frequent incidents of waste burning in several neighbourhoods, raising concerns over inaction by civic authorities even as air quality remains in the "very poor" category. The complaints surfaced on a day when the Commission for Air Quality Management announced the revocation of Grap 4 restrictions across Delhi-NCR following a marginal improvement in air quality. Delhi's air quality index stood at 378 on Tuesday, compared with 410 on Monday and 440 on Sunday. Grap 4 curbs had been imposed on Saturday, January 17, after air quality slipped into the "severe" category. Residents from Sectors 23A, 52, 54, 80 to 85, 102 and Palam Vihar said multiple incidents of waste burning were reported over the past month. Neeru Yadav, president of the RWA of Sector 23A, said, "The most serious incident occurred on January 6, when fire tenders had to be called in to douse the flames. Fresh incidents were reported on January 13, 14 and 17, with the latest occurring on Monday," she said. Vikas Yadav, a resident of Sector 86, said waste is frequently set on fire along the stretch connecting Sector 86 to IMT Manesar. "A garbage dumping site has developed along this stretch. Despite reporting the issue several times, no action has been taken so far," he said. Gurugram and Manesar recorded AQI levels of 394 and 328 respectively, both categorised as "very poor". Environmentalist Ruchika Sethi said waste burning remains a widespread practice due to inadequate waste collection and processing systems Ravinder Yadav, additional commissioner of the Municipal Corporation of Gurugram, said the civic body has taken cognisance of recurring waste-burning incidents across the city. "We have identified several waste-burning spots, and are taking action on the ground. Heavy fines are being imposed on vilators," he said....