Wall Street Journal: he U.K. government will propose that the European Union should commit to a legally binding 50% cut in emissions of carbon dioxide, compared with 1990 levels, by 2030, the country's Secretary of State for Energy and Climate Change, Ed Davey, said in a statement Saturday. The EU already targets a 20% cut in CO2 emissions by 2020, but this reduction is not ambitious enough, Mr. Davey said. So EU member states should commit to a unilateral 40% cut in emissions by 2030, and a 50% cut if a broader global...