PROMIT MUKHERJEE SOUTH AFRICA'S efforts to wean itself off coal and focus on renewables, battery storage, electric vehicles and setting up a green hydrogen economy would require funding of over a trillion rand ($63.70 billion) by 2030, a top government official said on Tuesday. In November, the United States, Britain, France, Germany and the European Union agreed to offer a $8.5 billion package to help South Africa accelerate a transition from coal. South Africa is the world's 12th biggest emitter of climate-warming gases and the biggest in Africa. It is a coal-intensive economy where a fleet of decades-old and inefficient…