Acid rain is a threat to our world. It harms lakes, plants, animals, and humans. In many cities around the world, statues, monuments and historic buildings are continuing to be damaged by acid rain. The damage is caused from acid fumes containing sulfur dioxide that comes from pollution emitted by automobiles and factories. When these rise into the atmosphere, they react with water in the atmosphere to form sulfuric acid and nitric acid. These fumes, whether they are dry or mixed with water create acid rain that eat away stone, metal and statues. To measure acid rain, you use a scale called "pH". The scale is from zero (most acidic) to 14 (basic or alkaline). Pure water has a pH of about 5.6 because it is slightly acidic because the carbon dioxide dissolves in it. In some parts of the United States, the rain falling has a pH of between 2.6 and 3.6 because of the presence of these acids. In my experiment, I'm going to observe the effect of acid rain on building materials.
