“The National Green Tribunal today directed the Delhi government to consider shutting schools whenever air quality touches emergency levels to save the children from inhaling pollutants. A bench headed by NGT Chairperson Justice Swatanter Kumar asked the AAP government to look into this aspect and incorporate it in its action plan to deal with the problem of air pollution. “Why don’t you close schools whenever the particulate matter levels are found to be beyond 900 microgram per cubic meter. Ask the schools to run on Saturday and Sunday if required,” the bench observed. ” 
Financial Express
December 18, 2017
Read it on Delhiair.org: Close schools if air quality hits emergency mark: NGT to Delhi Government
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