Reuters: A U.N. report about ways to fix global warming due on Sunday is likely to disappoint investors seeking clear-cut economic calculations about the benefits and costs of curbing rising greenhouse gas emissions.
Authors say the report stops short of an economic bottom line since it is hard to put a value, for instance, on human lives lost to extreme weather or on risks of a faster melt of Greenland's ice sheet that would push up sea levels.
The United States and other governments, at talks in Berlin,...