Business Green: South Korea will spend about 27.5 trillion won ($24 billion) by 2030 building smart electricity grids, according to a statement from the government. The private sector is expected to invest 24.8 trillion won ($21.6bn), with the government meeting the 2.7 trillion won ($2.4bn) shortfall, South Korea’s Ministry of Knowledge Economy said today in an emailed statement. “After having tried to establish national plans on the smart grid throughout last year, we will come up with …