Guardian: The secretary for future vision is considering how many South Koreans it takes to change a million lightbulbs. No joke. Kim Sang-hyo, the president’s extravagantly titled right-hand man, is trying to create more than 940,000 green jobs and improve his country’s energy efficiency at the same time. Switching every bulb in every public building in South Korea to light-emitting diodes by the end of this year is one, very small, element in the master plan of what has been described as the …