Enough of air pollution. Let move on to water pollution.

Water pollution is contamination of water due to human activities. It may cause harm to the living organisms in the water.

Cause of water pollution

• Ship discharging waste into sea
• Discharge of chemical waste into river
• Refuse dumping into rivers
• Oil spillage
• Chemical spraying in agriculture contaminates underground water

Effect of water pollution

• Fertilizers help the bacteria in the water to grow and increase the concentration of bacteria
• Oil float on top of the water and prevent the organisms in the water from breathing
• People might die or sick after consuming underground water
• Destroy of Food Chain

Ways of reducing water pollution

• Not to dump anything to the sea, river, etc
• Minimize the use fertilizer
• Maintain the vehicles if there any leakage
  

http://www.grinningplanet.com/5005/environmental-jokes-cartoons.htm
I think the website above is quite good as it presents about pollution stuff in cartoons, joke and humor ways. In this way, it will make young people more interested in those topic rather than having words.

In my opinion, most of water pollution had have direct or indirect impact on our foods. It is like you reap what you sow principal. You polluted the water then you also have to bear the consequences. In this case, you will not have fresh fish as all the fishes are dead caused by our negligence.