Question

Short note on river pollution

Answer 1

Hello buddy..

Water Pollution
           Water pollution has been a problem for a very long time. There are many different kinds of water pollution. Water pollution causes many problems with the living plants and animals in the water.
             Water has always been used to carry away unwanted trash. Since the beginning of civilization people have used our waters to dump their trash in. Rivers, streams, canals, lakes, and oceans are currently used as receptacles for every imaginable kind of pollution. Lakes are especially polluted because they cannot cleanse themselves as rapidly as rivers or oceans. Materials that decay over a short period of time are called, biodegradable materials. Biodegradable materials are less of a long-term threat to the enviroment than materials like metals, plastics, and some chlorinated hydrocarbons, but can still damage a water supply for long periods of time. Metals, plastics, and some chlorinated hydrocarbons remain in the water and can make it poisonous for most forms of life. These materials are not biodegrable, which means that they are a greater risk to the environment..

Hope it helps you buddy..

Answer 2

the pollution of river is caused by dumping of untreated sewage and industrial wastes there are more things but....lets just hope this may help u
hope u understand and that this 
helps