Hindu: As the last round of negotiations before the year-end Cancun climate conference begins on Monday in Tianjin, a port city near here, Chinese officials played down the chances of a binding climate deal being reached this year, citing persisting differences between developed and developing countries. China’s top climate official Xie Zhenhua said this week developed countries needed “to do more and do better” to take on greater emission cuts, if a binding deal was to be reached. “To push …