ZHENGZHOU — A Chinese water resources official on Sunday called on people to improve the awareness of water saving and protection in a bid to curb pollution of rivers from spreading and worsening. 
Li Xiaoqiang, chief of publicity section with the Yellow River Conservancy Committee, made the remark over the phone while commenting on the fact that pollution had spread to one third of the Yellow River system. … The Yellow River Conservancy Committee said in a bulletin released last Thursday that it monitored the mainstream of the Yellow River and its tributaries last year, with the combined length totaling 13,492.7 km, and found 4,557.6 km, or 33.8 percent of the waterways monitored, to have polluted water classified as type-five negative.
Pollution worsens on Yellow River system: bulletin
