Acid Precipitation

1. Acid precipitation is precipitation that is mixed with pollutants like sulphur dioxide, and nitrogen.


2. Sulphur dioxide and other chemicals come out from factories; they mix with the precipitation in the air, and then comes to the ground as precipitation.


3. Acid rain is so wide spread today because there are many factories polluting the air and that creates acid rain


4. Lakes in some areas are affected more by acid precipitation than others because of the winds and the direction acid precipitation is pushed




a) Acid rain affects lakes and aquatic life by, first the PH level. If the PH level is too high or low, aquatic life begins to die. Also acid precipitation can create deformed fish


b) You can tell a lake has been acidified because it may contain algae that smell bad. Also, the water is clearer because the organism’s die, this makes plants grow that takes the oxygen from the water. Plants grow because sunlight reaches the bottom easier as the water is clearer.


c) Approximately 14000 lakes have been affected.



a) It removes the waxy surface of leaves, making them less resistant to disease. Germination/reproduction rates of plants lower. As the acidic water sinks into the ground, it dissolves/carries away mineral nutrients needed for plant growth. Animal populations that eat these plants decline. It can dissolve metallic minerals from rocks. Makes aluminum more soluble. Aluminum, mercury, lead and other toxic metals dissolved by acidic water may flow through the water table into rivers and lakes, aquatic life is negatively affected. Dissolved aluminum coats fish gills, suffocating them.


b)Acid precipitation and the dry deposition of acidic particles corrode automobile finishes, monuments, and the stone and paint of buildings. This leads to increased maintenance costs and reduces objects beauty and value.


c) Acid precipitation can be blamed for fewer jobs and lower profits in some economic sectors. Lots of the salmon industry is lost due to high acid levels in spawning streams. When environment is damaged, there is less productivity in fisheries, forestry and agricultural industries


d) Metals dissolved in soil end up in drinking water. Acidic water corrodes water pipes. Health problems from drinking metals in drinking water for years. 80% of all Canadians live in areas with high acid precipitation-related pollution levels, the cost to our healthcare system over time is considerable.


7. The Canada/U.S. Air Quality Agreement was signed in 1991, by which both countries agreed to reduce their sulphur dioxide emissions by 50% by the year 2000. This will bring the amount of SO2 emitted into the atmosphere within the average limit. Scientists have conducted experiments in which huge amounts of crushed limestone have been dumped into threatened lakes. The linestone neutralizes excess acidity, but this solution is far too expensive to be considered for the large number of lakes affected by acid precipitation. It would cost $1 billion dollars to lime the lakes in Ontario. We can reduce the amount of energy used in your home, and limiting driving. You will also reduce your ecological footprint.