The rain becomes acidic because of gases like sulphur dioxide and nitrogen oxide, which are produced due to air pollution, dissolve in the rainwater and form various acids. ... See sulphur dioxide gas in the air dissolves with rain to form acid rain. ... Now when ammonia in the air comes in contact with the acid rain on the tree it makes the tree less strong and more likely to get frost or some other plant disease. ...

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• Approx Pages: 11
• Grade Level: High School

Acid rain is the term for pollution caused when sulfur and nitrogen dioxides combine with atmospheric moisture. ... More than 90% of the sulfur and 95% of the nitrogen emissions which occur in North America are due to the pollution created by humans.1 How Is Acid Rain Formed? ... It becomes sulfuric acid as it joins with hydrogen atoms in the air and falls down to earth. Oxidation occurs most in clouds, especially in heavily polluted air, where other compounds such as ammonia and ozone help to catalyze the reaction, increasing the amount of sulfur dioxide changing to sulfuric acid. ...

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