The National Green Tribunal, under the aegis of ministry of environment and forests, on Wednesday cancelled the environmental clearances granted to the 2,640MW coal-fired power project of Nagarjuna Construction Company coming up at Sompeta in Srikakulam district of Andhra Pradesh. The . 14,000-crore thermal power project, to come up in two phases of 1,320MW each, has been hanging in fire for nearly two years following violent protests by locals against the project that led to three people getting killed in police firings in July 2010.