Dissolved oxygen is the oxygen present in water required by the aquatic system to continue the lives of plants and animals.
However biochemical oxygen is the demanded oxygen by the aerobic micro-organisms to oxidize organic matters of wastes.
The effect of water pollution varies from place to place upon the type and amount of water contamination.
The degradation of drinking water needs an urgent basis prevention method which is possible by the proper understanding and support from the end of each and every person living on the earth.
Thousands of seabirds are killing because of the oil spilling from ships and industries.
High level of water pollution is done due to the chemicals coming out of the agricultural usage of fertilizers, insecticides and pesticides.
The highest level of water pollution is caused by the pollutants come from agriculture field because of the high use of fertilizers, insecticides, and pesticides to enhance the production of crops.
We need to bring vast improvements in the type of chemicals we use in the agriculture. Leaked oil from the land or rivers, oil transport through ships, ship crashes, etc flows to the sea or ocean and affecting whole water.
Here we have provided some easily written essay on water pollution for students.
They can select any water pollution essay according to the need and requirement: Water pollution has become a continuous increasing problem on the earth which is affecting the human and animal lives in all aspects.