Question:What cause the water pollution?

Water  Pollution

    According to the environment department monitoring, there are at least one hundred million tons of sewage without treatment, then directly discharged into the water everyday in China’s urban. The life sewage what contains a large number of nitrogen ,phosphorus, potassium and other harmful chemical discharges into the rivers .It leads to eutrophication .The eutrophication can speed up the death of fish.

    A fact of life has to be mentioned, based on the statistics,1.1 billion people lack access to safe drinking water in the world. Each year 5 million people were killed by it, and one child died every 15 seconds from it. 

monitor：监测，监控

 sewage：污水

nitrogen：氮

phosphorus：磷

potassium：钾

eutrophication：水体富营养化

discharge：排出