* Natural Sources: While nature does produce some sulfur dioxide and nitrogen oxides (the primary culprits in acid rain formation), these amounts are relatively small compared to human-made sources. Volcanic eruptions, for example, release sulfur dioxide, but these events are infrequent and localized.

* Human-Made Sources: The burning of fossil fuels (coal, oil, and natural gas) in power plants, factories, and cars releases significant amounts of sulfur dioxide and nitrogen oxides into the atmosphere. These gases react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid, which then fall to the ground as acid rain.

Here's a breakdown of the impact:

* Natural sources contribute roughly 5-10% of the total sulfur dioxide and nitrogen oxides in the atmosphere.

* Human activities contribute the remaining 90-95%, making them the dominant force behind acid rain formation.

In short, while nature plays a small role, human activities are the primary driver of acid rain.