Water pollution means that there are foreign substances include inorganic compounds organic or radioactive, these various organisms in water lower water quality until the danger.
Pollution means that the foreign substances are organic compounds, inorganic or radioactive creatures. These things in the water. Water quality decreased Dangerous
Water pollution refers to foreign substances including organic matter, inorganic matter. The radioactive or various creatures. These when in the water. The quality of water down until the danger.