A prominent environment NGO has strongly condemned world leaders at the climate summit for failing to finalise a "legally binding" treaty and brokering a "take it or leave it" deal which it said was full of loopholes.<br/><br/>Terming the Copenhagen Climate Summit "a huge missed opportunity" Greenpeace today in a statement claimed "the world's most powerful countries have betrayed future and current generations."<br/><br/><br/>