This world needs the good environment. People should protect our homestead. Society is focus on pollution in river all over the world. As we know water is spring of life. We can't live without it, and water in river is more important for human's daily life. It is a big problem. It is the major factories and industries that are causing the problem. We should find some good ways to prevention and mitigation. Let us to join protect action, in order to ourselves.
Water pollution is a serious problem threatening the survival of human beings, plants and animals. It is urgent that some strong measures be adopted to deal with the problem. Most of them produce by the cities and towns. With the development of modern agriculture and industry, more and more waste water is being poured into rivers. It has caused serious pollution. The river is becoming so dirty that no living things can live in it.
The river is giving off a terrible smell.
We divide water into ground water and underground water. Water pollution mainly comes from living sewage and industrial wastes. The common water pollution materials are: inorganic substances, inorganic toxic substances, organic toxic substances, aerobic contaminating material, plant nutrient, radioactive substances, oil, cooling water, micro-organism and so on. Main inorganic substances of water pollution are acid, alkali and some inorganic salts. Acid and alkali pollution can change water's pH value, destroy its natural buffer capacity, eliminate the bacterium and other micro-organisms or suppresses its growth, affect the fishery and corrode the ships.
The water in river is affinitive with human. And pollution in river must cause some problems.
Economy: If river pollution for a long time. The economic must to decrease.
Society: Dirty water in river can make people unhealthy. Chemicals can kill fishes...