Reuters: The European Union finalized plans for its battle against global warming on Wednesday, seeking to lead the way toward a broad alliance including other big polluters like China and the United States. The European Parliament approved a cut in carbon dioxide emissions to 20 percent below 1990 levels by 2020, heeding warnings of severe weather, famine and drought as the atmosphere heats up. The deal takes on a greater importance coming just before Barack Obama assumes the U.S. …