Questions 1-3 are about the following passage.

    Acid rain can harm buildings, plants, and even people. Acid rain is rain that contains acidic chemicals. It is caused by chemicals put into the environment by humans. These chemicals mixing with water cause the acid rain that we have on Earth today.

    "Acidic" means that the rain's pH level is acidic rather than neutral or basic. A pH scale runs from 0 to 14; the lower the number, the higher the acidity. Water is right in the middle with a pH of 7. Bleach and other cleaning fluids are usually basic. These are dangerous too because they dissolve protein. Acids tend to taste sour and can hurt people by burning them. These acids can also erode concrete or metal.

    Obviously, rain, snow, and ice can damage buildings and forests, but acidic rain, snow, and ice make this damage happen much faster. The famous Statue of Liberty in New York City had to be fixed because of acid rain. Some cities cover up their statues during the winter when snow and ice stays on the ground for a long time. Acid rain can also harm animals. Fish eggs in ponds and lakes cannot hatch if the pH is below 5.