If there’s one hurdle that the proposed Ganga project will not run into, it will be water supply. Not till 2050, at least. And there’s going to be an abundance of it. The reasons, however, should be disconcerting — this will be on account of climate change. A projected increase in precipitation and glacier melt due to climate change, in fact, will result in greater runoff from rivers in High Asia until at least 2050, a paper published online in Nature Climate Change has projected. This suggests...