The National Green Tribunal has slammed the Archaeological Survey of India (ASI) over the poor condition of the iconic Purana Quila lake in New Delhi and summoned its officials to explain why it has not been cleaned despite its direction. <br/><br/>A bench headed by NGT Chairperson Justice Swatanter Kumar noted that the lake, which was earlier a place of tourist attraction, was covered with moss and become a dumping ground. <br/><br/>In the May 19 order, the green panel had asked for expeditiously restoring all water bodies in the city. It asked the ASI official to appear before it and explain why silt, sand and other debris have not been removed from the lake despite its specific direction.