Guardian: Chinese authorities stepped up their efforts to disperse a major oil slick in the Yellow Sea yesterday by mobilising 800 fishing boats to help the clean-up operation. The flotilla will join the 24 specialist ships that have been spraying dispersal agents, soaking up crude with panels of absorbent felt and using a floating barrage to prevent the slick from contaminating the beaches near Dalian. Investigators have also launched a probe into the pipeline explosion that caused the …