Agence France-Presse: Chancellor Angela Merkel issued a contentious call on Sunday to slow Germany’s planned phase-out of nuclear energy, amid growing fears it will be impossible to slash greenhouse gas emissions without it. Germany is planning to mothball the last of its 17 nuclear power plants by 2020 under a plan approved under Merkel’s predecessor Gerhard Schroeder. But the issue has divided Germany’s ruling left-right coalition, with conservatives such as Merkel favoring continued use of …