National Green Tribunal will continue to hear today pleas seeking to stop construction of temporary structure on the flood plains of Yamuna for Sri Sri Ravi Shankar's Art of Living World Culture Festival in Delhi. A bench headed by NGT chairperson Swantanter Kumar yesterday asked Ministry of Environment and Forest to file an affidavit today and tell why no environmental clearance is needed for raising temporary structures. <br/><br/>The direction came after counsel appearing for the Ministry said that they have found no debris at the site, when an expert team had visited. Counsel added that as per Environment Impact Assessment notification 2006, no environment clearance is needed for temporary structures. In yesterday's hearing the Green Panel also questioned the building up of pontoon bridge by the Army on river Yamuna for the festival. World Culture Festival organised by Art of Living is scheduled to be held from March 11 to 13 on the banks of the Yamuna.