Reuters: The deadline for a new global accord on climate change should be extended if Washington is not ready to make commitments on cutting greenhouse gas emissions by December, the head of a major environmental funding agency said on Monday. More than 190 governments agreed in 2007 to forge a climate treaty by the end of 2009 at U.N. talks in Copenhagen, after scientists warned that rising emissions, mainly from burning fossil fuels, would bring more droughts, floods and rising …