Answers

2015-11-01T21:20:08+05:30
People used to throw some coins in rivers.as the coins used to be made of copper.this helped the water to get purified.but today the coins are not made up of copper ,they are made of iron .but still the habit of throwing coins into water did not leave people.so the water is getting impurified day by day.
0
2015-11-01T21:42:09+05:30
The main reason of coliform bacteria in Ganga river is the disposal of waste materials which includes faeces of humans and other animals. It contains large amount of coliform bacteria.
0