Lead, carbon monoxide and nitrogen oxides are added to the atmosphere by:

Options

A. burning of fossil fuels
B. automobile exhaust
C. gaseous affluent from factories
D. all of the above

Answer

**Step-by-Step Solution:**

1. **Identify the Pollutants**: The question mentions three specific pollutants: lead, carbon monoxide, and nitrogen oxides.

2. **Sources of Pollution**:
- **Burning Fossil Fuels**: When fossil fuels such as coal, oil, and natural gas are burned for energy, they release various pollutants, including carbon monoxide and nitrogen oxides. This process is a significant contributor to air pollution.

- **Automobile Exhaust**: Vehicles powered by gasoline or diesel emit exhaust gases that contain lead (from leaded gasoline), carbon monoxide, and nitrogen oxides. The combustion process in engines produces these harmful emissions.

- **Industrial Emissions**: Factories and industrial plants often release a variety of pollutants into the atmosphere. These emissions can include lead, carbon monoxide, and nitrogen oxides, depending on the processes and materials used in production.

3. **Conclusion**: All three sources mentioned contribute to the addition of lead, carbon monoxide, and nitrogen oxides to the atmosphere. Therefore, the correct answer to the question is that these pollutants are added to the atmosphere by all of the above sources.

4. **Final Answer**: The correct option is "all of the above."

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