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Modern society is becoming overwhelmed with great amounts of pollution from cars, factories and an overabundance of garbage. The immense amounts of sulphur dioxide emitted into the air causes high levels of acid in the atmosphere. When this sulphuric acid is absorbed into moisture in the air, poignant rainfalls can be damaging to the external environment. Acid rain is destroying the world’s lakes, air and ecosystem. Acid rain is killing lakes and decreasing the number of inhabitants in these fresh water bodies. It can cause an ample deduction in the pH levels in the water. At a neutral level the pH in water should be close to seven, yet in these acidic water bodies the pH levels can be as low as four. Each decade the pH levels of lakes around Ontario have become ten times more acidic. The high acid level contained in lakes also causes a decrease in the number of fish inhabiting the water. Acid produces chemical changes in the blood of the fish residing in the water, and their basic body metab