Ammonia acts as a base that neutralizes acidic substances like sulfate and nitrate ions in the atmosphere, which contribute to increased acidity in rainwater. When ammonia reacts with water, it forms ammonium ions that reduce the effects of acid deposition by neutralizing the acidic substances in the atmosphere. Therefore, ammonia helps reduce the impacts of acid deposition.

1. Role of ammonia in acid deposition?

2. We already know that sulfate and nitrate ions in the atmosphere contribute to increased acidity levels in rainwater

3. Ammonia acts as a base, and neutralizes these acidic substances Ammonia + Water -> Ammon ium ion

4. Therefore, ammonia also reduces the effects of acid deposition – because in a sense it neutralizes the otherwise heavily acidic substances in our atmosphere