Lead pollution is mainly caused by

Options

A. sewage
B. insecticide
C. leaded gasoline
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Lead Pollution**: Lead pollution refers to the presence of lead in the environment, which can adversely affect human health and the ecosystem. It can occur in various forms, including air, soil, and water pollution.

2. **Identifying Sources of Lead Pollution**: To determine the main cause of lead pollution, we need to identify common sources of lead in the environment. Some known sources include industrial emissions, leaded gasoline, lead-based paints, and lead pipes.

3. **Analyzing Leaded Gasoline**: Among these sources, leaded gasoline has been identified as a significant contributor to lead pollution. Lead was added to gasoline to improve engine performance, but it resulted in widespread lead contamination in the air, soil, and water.

4. **Impact of Leaded Gasoline**: The combustion of leaded gasoline releases lead particles into the atmosphere. These particles can settle on the ground, contaminate soil, and enter the food chain through crops. Additionally, lead can leach into drinking water from lead pipes.

5. **Conclusion**: Based on the analysis, it is clear that lead pollution is mainly caused by leaded gasoline, which has had a more significant impact on lead exposure than any other source worldwide.

**Final Answer**: Lead pollution is mainly caused by leaded gasoline.

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