Water pollution is very serious in the world. These pollution are diffused into the environment. When water moves across and through the land, it wiuld carr away natural and human-made pollutants. and keep them into the lakes, rivers, ocean and the underground water. That make the water lost it's pure quality.

1. Ocean pollution--- A plenty of factories had polluted ocean by the untreated sewage. These actions would effect the biologic cycle in the ocean.

2. River pollution--- There are several sources of water pollution which reduce river water quality. For example, Industry and agriculture discharge water and pollutants. That made rivers were polluted. Also it effected people's health.

3. Lake pollution--- Due to these pollutants were flewed from the rivers. And they sank down in the lakes. These pollutants would produce chemism in the bottom of the lake. The product would pollute the water, and effected the fishes which lived in the lake.