There are many different types of pollution, but we will consider the four main ones water, soil, air and noise. Water pollution has both natural and human causes, but pollution causes, but pollution caused human activity is generally more widespread. Water pollutants can be divided into three main categories: Natural pollution comes from soil erosion, or inorganic plant nutrients such as animal waste and fertilizers. Human-waste pollution comes from sewage containing waste, soaps detergents. 3. Industrial pollution comes from organic, inorganic, and radioactive contaminants produced by factories, etc. Many viral and bacterial diseases are transmitted by water pollution, the most common being cholera, dysentery, enteritis and typhoid.