Here's why:
* Acid rain's effects are primarily on the environment: Acid rain is caused by sulfur dioxide and nitrogen oxides released into the atmosphere, primarily from burning fossil fuels. Its main impacts are on plants, water sources, and infrastructure, like buildings and statues.
* Hair color is determined by pigments: Hair color is determined by melanin, a pigment produced by cells called melanocytes. Acid rain doesn't have the chemical properties to directly affect or change melanin.
* Green hair is usually due to other factors: Green hair is typically a result of:
* Dyeing: People dye their hair green for fashion or other reasons.
* Algae: In rare cases, algae can grow on hair in damp, humid environments.
So, while acid rain can be harmful, it doesn't have the effect of turning people's hair green.