BD Tripathi, Ganga Scientist, BHU says, “Ganga problem has been there for a long time. Prime Minister Narendra Modi made a new ministry. Thirty years before Prime Minister Narendra Modi-led government’s flagship ‘Namami Gange’ was launched, late prime minister Rajeev Gandhi had set up the ‘Ganga Action Plan’ on 14 June, 1986. “There is no doubt that after Narendra Modi …