免费日韩片_欧美成人精品一区二区男人小说_国产乱码一区二区三区四区_国产精品国产三级国产aⅴ入口_成人看的污污超级黄网站免费_欧美一级在线免费观看_成人午夜免费无码福利片_国产乱人伦偷精品视频色欲_aaa少妇高潮大片免费看_国产精品1234_亚洲精品国产suv一区88_中文字字幕在线中文无码_精品亚洲区_午夜九九九_国产av国片精品jk制服丝袜_色综合亚洲_亚洲成av人片无码bt种子下载_欧美色就色_精品少妇的一区二区三区四区_男人用嘴添女人下身免费视频

Health threats to China's drinking water are increasing because of the serious contamination of many of the country's water sources.

At a symposium on potable water safety and health, a group of Chinese experts on Monday urged the government and enterprises to introduce more high-end technologies to protect people from drinking polluted water.

The symposium is being held concurrently with a national water pollution prevention conference organized by the State Council.

The deterioration of the general water situation on the Chinese mainland means that most of the source water for Chinese waterworks is polluted to some extent.

According to E Xueli, a researcher with China Disease Prevention and Control Center, for economic and other reasons, more than 90 percent of Chinese waterworks are still using outdated technologies developed at the beginning of the 20th century.

"Those waterworks can handle physical and microbial pollution but not chemical pollution," he said.

"China's waterworks can only filter out 30 percent of the organic substances in the water treated. People drink the other 70 percent," warned Wang Zhanshen, a professor with the Tsinghua University.

China must deal with potable water problems in a scientific and pragmatic way, spreading water health knowledge and mobilizing society to promote water safety, Wang said.