Hi, pollution is pretty bad because it is dangerous to people and animals. People or animals who drink the water can get diseases. If everybody in the world polluted the water the world would be in complete disease. There would be a lot of people dying. I know they could clean the water but, there is to much water to be cleaned, pollution is all around us. There is air pollution, water pollution, and ground pollution. Water and air pollution is the hardest to clean up and the most dangerous. It can be dangerous because when it's in the air, we breathe it in and it can affect your lungs. When it's in the water you drink it can give you diseases or maybe even death. If it's on the ground its not as bad but, it's still not good for you. It can attract some parasites and some other bad things.