United Press International: The United States and China are racing to see who can make dirty coal cleaner by trapping emissions and pumping them deep underground, sources said. The technology, called carbon capture storage, got a boost last month when President Barack Obama announced a $1 billion revamp of a near-zero-emissions coal-fired power plant in Illinois called FutureGen. China’s project is named GreenGen. The first country to prove that carbon capture works would be in the enviable position of …