Associated Press: The global financial crisis will make it harder for countries to agree on an ambitious new treaty to combat global warming and underscores the need to make green technologies profitable, the U.N. climate chief said Thursday. “Climate change is an environmental problem looking for an economic answer,” Yvo de Boer said at a news conference in Warsaw. “The challenge…is to achieve green economic growth.” De Boer spoke ahead of a major two-week climate change conference that …