Acid rains are produced by

Options

A. excess `NO_(2)` and `SO_(2)` from burning fossil fuels
B. excess production of `NH_(3)` by industry and coal gas
C. excess release of carbon monoxide by incomplete combustion
D. excess formation of `CO_(2)` by combustion and animal respiration

Explanation

### Step-by-Step Solution

1. **Understanding Acid Rain**: Acid rain is a form of precipitation that contains high levels of sulfuric and nitric acids. It can have harmful effects on the environment, including damage to forests, lakes, and buildings.

2. **Identifying Causes of Acid Rain**: The primary causes of acid rain are the emissions of certain gases into the atmosphere. The main gases responsible for acid rain are sulfur dioxide (SO₂) and nitrogen oxides (NOₓ).

3. **Sources of Emissions**: These gases are primarily produced from the burning of fossil fuels, which occurs in thermal power plants, industrial processes, and automobiles.

4. **Chemical Reactions**: Once in the atmosphere, sulfur dioxide and nitrogen oxides react with water vapor and oxygen to form sulfuric acid (H₂SO₄) and nitric acid (HNO₃), which then fall to the ground as acid rain.

5. **Evaluating Other Options**:
- Ammonia (NH₃) is not a significant contributor to acid rain.
- Carbon monoxide (CO) does not contribute to acid rain.
- Carbon dioxide (CO₂) is not directly responsible for acid rain, although it is a greenhouse gas.

6. **Conclusion**: The correct answer to the question "Acid rains are produced by" is the excess nitrogen dioxide and sulfur dioxide from burning fossil fuels.

### Final Answer
Acid rains are produced by excess nitrogen dioxide and sulfur dioxide from burning fossil fuels.

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