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  1. Acid Rain and Water | U.S. Geological Survey - USGS.gov

  2. What is Acid Rain? | US EPA - U.S. Environmental Protection Agency

  3. Acid rain facts and information - National Geographic

  4. Acid rain | Definition, Causes, Effects, & Formulas | Britannica

  5. Acid Rain: Causes, Effects and Solutions - Live Science

  6. How Does Acid Rain Affect the Environment - Earth.Org

  7. Acid rain - Wikipedia

  8. Acid Rain | U.S. Geological Survey - USGS.gov

  9. Effects of Acid Rain | US EPA

  10. Acid Rain | US EPA - U.S. Environmental Protection Agency