If you need a plumber to deal with the water pipes in your kitchen, you will call the best one you know, but if you want to know about the cleanest rives in the world, it would be quite enough to read this article. Water is the source of life, and that is something that everyone may just confirm. People who have the everyday access to it usually take it for granted, while for those people who need to walk miles in order to get some clean water, it means the world. From the earliest ages, the...