NEW DELHI, Sept. 17 -- Namami Gange, the Central government's ambitious project to clean the Ganga, seems to have delivered modest results, with the quality of river water from Rudraparayag in Uttarakhand to Uluberia in West Bengal having improved between 2014 and 2019, according to Jal Shakti ministry data, but experts say it will take decades before the water becomes fit for human consumption ....