Telegraph: In another 60 years, Calcutta will be the most vulnerable city in the world with respect to climate change, claimed a report released at a United Nations climate conference in Bali in 2007. It was followed by Mumbai and Dhaka. The prediction about Calcutta looks likely to come true. The initial findings from a World Bank-supported study on climate change impact on Calcutta, presented at a Bangkok conference recently by the state’s chief environment officer, Debal Roy, identifies the …