Environmental science encompasses a variety of academic disciplines and derives much of its popularity from its diversity. One timely topic that effectively combines aspects of chemistry, ecology, earth science, and botany is acid deposition. These materials may be wet, such as rain, snow, and fog, or dry, such as particles of sulfate and nitrate salts. These gases react with oxygen and water in the atmosphere to form sulfuric and nitric acids and sulfate and nitrate salts. Many natural events, such as volcanic eruptions, forest fires, hot springs, and natural geysers, produce sulfur dioxide and nitrogen oxide gases.
Human activity makes a significant contribution.
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