Garbage dumping into rivers is one of the cause of river pollution . It will have a very bad effect on the river when all the domestic waste and rubbish is dumped into it. This will cause the river to be filled with waste materials and waste plastic floating on the surface of the river water. In addition , the color of the river water will change to greenish and blackish from its original color which is clear. As an example can be seen, in our own country , we can see the rubbish left on the surface of the river and the murky color of the water in the rivers in urban areas as well as in the village area itself.