Limestone buildings and sculptures are eroded primarily by which of the following?Question 9Select one:a.UV radiationb.acid rainc.ozone pollutiond.CFCs

To determine which factor primarily causes the erosion of limestone buildings and sculptures, we need to analyze the choices given.

1. UV radiation: While UV radiation can contribute to the degradation of materials, it does not directly erode limestone.

2. Acid rain: This is a significant factor in the erosion of limestone. Acid rain occurs when pollutants such as sulfur dioxide and nitrogen oxides combine with moisture in the atmosphere, creating sulfuric and nitric acids. These acids react chemically with the calcium carbonate in limestone, leading to erosion and the gradual dissolution of the material.

3. Ozone pollution: Similar to UV radiation, ozone pollution can affect some materials but is not primarily responsible for limestone erosion.

4. CFCs: Chlorofluorocarbons (CFCs) are known for their role in ozone depletion and do not directly cause erosion of limestone.

Final Answer

The primary factor that erodes limestone buildings and sculptures is b. acid rain.