At least 460 schoolgirls were affected by toxic fumes from a chemical spill near two schools in the south-east Delhi on Sunday.
India Director of Pesticide Action Network (PAN) C Jayakumar, in a statement said, "Even after several incidents right from the Bhopal gas tragedy, our authorities have not realised the seriousness of the problem and are not taking measures to keep away hazardous chemicals from the vicinity of even education institutions in view of public health and safety".
Narasimha Reddy Donthi of PAN India underlined the urgent need for establishing "buffer-zones of at least a kilometre" around education institutions and childcare centres.
"Hazardous chemicals, pesticides and or raw materials used to produce such dangerous chemicals should not be stored, manufactured or used in any form near this safe zone," he said.