Bloomberg: South Korea, Asia’s fourth-biggest polluter, said more than 300 companies including Samsung Electronics Co. and Posco must set energy-saving and greenhouse gas-reduction targets by September 2011 to fight global warming. They will face fines of as much as 10 million won ($8,708) if the targets aren’t met, the Ministry of Knowledge Economy said in an e-mailed statement today. Only companies with factories producing at least 25,000 metric tons of carbon dioxide a year are required to …