BARCELONA, Spain (AFP) – Green groups and activists for the developing world accused rich nations of tiptoeing away from vows to seal a binding, far-reaching UN treaty on climate change in Copenhagen next month. Their bitter response came after European Union (EU) negotiators in Barcelona spelt out the likelihood that the much-trumpeted pact would be concluded in 2010, not at the December 7-18 meeting as planned. The talks, launched under a two-year "road map" in Bali, call for a global accord to curb emissions of heat-trapping carbon gases beyond 2012 and channel funds to poor countries most threatened by drought,...