论文部分内容阅读
水利部最近公布了最新一次调查的结果表明,全国水污染状况相当严重。在水利部门对全国评价的近十万公里长的河流中,被污染河长已经占半数,其中有4万公里不符合渔业水质标准,2400公里长河鱼虾绝迹,一些大中城市的中小河流已变成排污河,90%以上城市水域污染严重。主要湖泊?
The latest survey released by the Ministry of Water Resources recently shows that the water pollution in the country is rather serious. Among the nearly 100,000 kilometers of rivers evaluated by the water conservancy department nationwide, half of them have been polluted, of which 40,000 km do not meet the standards of fishery water quality and 2,400 km of river fish and shrimp are extinct. The small and medium-sized rivers in some large and medium-sized cities have been Become a sewage river, more than 90% of urban water pollution. The main lake?