So far,China has designated 34 dumping areas for dredged materials of the third category and four areas for midair oil discharge. It has issued about 2,000 dumping permits and tightened up the monitoring of the environmental quality of dumping areas.

• 到目前为止，中国已建立了34个三类疏浚物倾倒区，4个空中放油区，签发倾倒许可证近2000份。