AAP: The Australian Greens have attacked Prime Minister Kevin Rudd’s plan to talk up the future of clean coal at the United Nations this week. Mr Rudd, in a speech to the United Nations General Assembly in New York, intends telling other nations about Australia’s push for burying under ground pollution from coal-fired power stations. Greens climate change spokeswoman Christine Milne has accused Mr Rudd of letting down the environment for the sake of the coal industry. “For …