Answer :
Answer:
Explanation:
Adding lead compounds to gasoline was a common practice in the past to improve engine performance and reduce engine knocking. However, it is no longer recommended due to several health and environmental concerns:
1. **Health Risks:** Lead is a highly toxic substance that can cause serious health problems, especially neurological damage, particularly in children and developing fetuses. Exposure to lead can lead to learning disabilities, behavioral problems, and other cognitive impairments.
2. **Environmental Pollution:** When leaded gasoline is burned in engines, it releases lead particles into the air. These lead particles contribute to air pollution and can contaminate soil and water, posing risks to ecosystems and human health. Lead pollution can persist in the environment for a long time and accumulate in the food chain.
3. **Regulatory Bans:** Many countries have banned or phased out the use of leaded gasoline due to its harmful effects on health and the environment. The use of unleaded gasoline has become the standard in most parts of the world as a result of these regulations.
Using unleaded fuel helps to reduce exposure to toxic lead and minimize environmental pollution. Modern engine technologies are designed to run efficiently on unleaded gasoline without the need for lead additives. Additionally, advancements in fuel additives and engine design have allowed for improved combustion efficiency and engine performance without the use of lead compounds.