The Principal Bench of the National Green Tribunal on Thursday directed the Ministry of Environment and Forests (MoEF) to lay down standards within four months for using lead in Polyvinyl Chloride (PVC) pipes, in consultation with Bureau of Indian Standards.The Bench, comprising Justice Swatanter Kumar (Chairperson), Justice Raghuvendra S. Rathore (Judicial Member) and Mr. Bikram Singh...