Agence France-Presse: Two South Korean firms Tuesday announced a 2.7 billion dollar initial deal to build power plants capable of generating 960 megawatts of renewable energy by 2015. South-East Power, a unit of state-run Korea Electric Power Corp, said it signed a memorandum of understanding with POSCO Engineering and Construction, a unit of steel giant POSCO. This calls for a total investment of 3.6 trillion won (2.7 billion dollars), including loans, to develop renewable energy using winds and …