Although rain is the most recognized form of acid deposition, it may also come in many other forms such as snow, sleet, hail, fog, or dry particles. Dry particle deposition accounts for about half of all acid deposition. Acid deposition occurs when sulfur dioxides (SO2) and nitrogen dioxides (NOx) are emitted from the burning of fossil fuels and released into the atmosphere. These acids then fall to earth in dry form or combined with water molecules to form acid precipitation (rain). The acidity of these depositions is measured using the pH scale. The pH scale is a logarithmic scale ranging from 1 to 14, with 1 being th

To solve the acid deposition problem, people need to understand how acid deposition causes damage to the environment. They also need to understand what changes could be made to the air pollution sources that cause the problem. Since there are many possible solutions to the acid deposition problem, leaders have a choice of which options or combinations of options are best.

Environmental Science: A Global Concern (Cunningham-Saigo)

www.epa.gov/airmarkets/acidrain/index.html

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