Commodity Online: As the world celebrates World Water Day on Saturday, nearly 1.1 billion people lack access to safe drinking water, it requires 100 tonnes of water to produce one ton of grain and food security is under threat. The UN, which has been celebrating World Water Day for last fifteen years, reported this week that the world’s glaciers are melting at "an alarming rate." Like reservoirs, glaciers store water and then release it at predictable rates, around which humans have formed communities …