Fill in the Blanks Water pollution and acid rainOnline version Water by Susana López 1 ACID materials rainfall Plants water inddirectly Fish added Building absorbed fertilizers directly RAIN clouds atmosphere Harmful WATER Soils health water POLLUTION occurs when large amounts of are to a body of . This can happen in two ways : - substances are released into the water . - Water can be polluted . For example , when it rains , used in fields may be carried into a stream . contains harmful chemicals such as sulphur and nitrogen . These chemicals are released into the as gases . They undergo a chemical transformation and are by the water in . They become part of and enter the cycle . Acid rain can have adverse effects on : - and forests - - Human - , other aquatic animals and insects -