Acid Rain and deposition

• within clouds (including fog) sulfur dioxide (SO₂) and oxides of nitrogen (NOx) can form acidic particles when they react with water:
  • SO₂ + H₂O --> H₂SO₄ (sulfuric acid)
  • NO_x + H₂) --> HNO₃ (nitric acid)
• problem is worse downstream of the source -->
• affects:
  • trees
  • lakes
  • architecture
• it's a world-wide problem:
  • Germany
  • China
  • Italy
  • Canada