One way water becomes contaminated in 3rd world countries is by bathing in the water or lake. If you bathe in the water your peeling skin, fallen hairs and bacteria gets inside of the water. This can be harmful because in 3rd world countries people get their drinking and cocking water from wells, lakes and rivers.
Also with old pipes, lead can come off of the pipe in into your water. When you drink the water you can get lead poisoning and can stop the brain from thinking or slow your thinking process.
An invention that can save people from drinking contaminated water is a water filter. A water filter cleans the water before you drink it. This makes sure all of the pesticides, bacteria, and lead is cleaned out of the water.
I think that everyone n the 3rd world country do not have these inventions because they are not as rich as the United States and because the United States are too selfish to lend a hand.
