Which acid is most abundant in acid rain?

Explanation

To determine which acid is most abundant in acid rain, we can follow these steps:

### Step 1: Understand the Composition of Acid Rain
Acid rain is formed when certain gases in the atmosphere, such as sulfur dioxide (SO2) and nitrogen oxides (NOx), react with water vapor. These reactions lead to the formation of acids.

**Hint:** Think about the sources of pollution that can lead to acid formation in the atmosphere.

### Step 2: Identify the Acids Formed
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