Lead-free gasoline is a type of fuel that does not contain lead compounds, which were once commonly used to improve engine performance. The removal of lead from gasoline began in the 1970s due to health concerns, as lead exposure can cause serious health issues, particularly in children. Today, lead-free gasoline is the standard in most countries, promoting cleaner air and reducing environmental pollution. It is often formulated with other additives to enhance engine efficiency and reduce harmful emissions, making it a safer choice for both vehicles and public health.