Washington Post: China pledged Wednesday that its worldwide search for oil and gas to power a booming economy will be carried out in a spirit of fair play and international cooperation so as not to disrupt sensitive international markets. The promise came in a government white paper, one of a series Beijing has issued in recent years to present its case to the world. This one, outlining energy policies, was aimed in part at fears that China’s growing thirst for imported oil will drive up prices and …