BANGKOK, Thailand — After two reports predicting a warmer Earth where life is fundamentally changed, a U.N.-sponsored scientific panel next month will issue a third study describing how a united world can avert the worst, by embracing technologies ranging from nuclear power to manure controls. Under a best-case scenario for heading off severe damage, the global economy might lose as little as 3 percentage points of growth by 2030 in deploying technologies to reduce greenhouse-gas emissions, says the panel's draft report, obtained by The Associated Press. But it won't be easy. "Governments, businesses and individuals all need to be pulling...