Tetraethyl lead and tetramethyl lead are used as additives in gasoline as anti-knock agents. As a result of this use, lead is released in the exhaust fumes, leading to increases in the lead levels in the environment.
ونتيجة لهذا الاستخدام يخرج الرصاص من عوادم السيارات، مما يؤدي إلى زيادات في مستويات الرصاص في البيئة.