By Alexander Winning3 Min ReadJOHANNESBURG( Reuters)-South African state power utility Eskom, Africa’s biggest greenhouse gas emitter, is pitching a$ 10 billion plan to global lenders that would see it shut the vast majority of its coal-fired plants by 2050 and embrace renewable energy. FILE PHOTO: Cows graze as steam rises from the cooling towers of Matla Power Station, a coal-fired power plant operated by Eskom in Mpumalanga province, South Africa, May 20, 2018.... Eskom currently emits aroun