Economy Greenpeace India urges government to speed up rolling out National Clean Air Programme Updated : June 17, 2018 04:35 PM IST Greenpeace India said air pollution is a "silent and invisible killer" and a national health emergency, asserting that big polluters must be held accountable for the menace. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.