Rajan Wilcox
Leaded gasoline, which was first developed in the 1920s, has been phased out for cars worldwide. The use of leaded gasoline has been linked to a range of health issues, from heart disease to reduced fertility, and it is also highly damaging to the environment. The phase-out of leaded gasoline for cars was a gradual process, with the EPA in the US beginning efforts to reduce lead emissions in 1973, and the Clean Air Act banning the fuel for use in on-road vehicles from 1996. While leaded gasoline for cars is no longer in use, it is still permitted for aircraft, racing cars, farm equipment, and marine engines.
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What You'll Learn
The dangers of leaded fuel
Leaded fuel has been described as one of the most toxic substances known to humanity, and its phase-out is considered one of the greatest environmental achievements of all time.
The toxic effects of leaded fuel are wide-ranging and severe. It has been linked to a range of health issues, including permanent nerve damage, anemia, mental retardation, heart disease, high blood pressure, strokes, kidney disease, reduced fertility, and developmental delays in children. The environmental impact is also significant, as lead easily pollutes air, soil, and water.
The phase-out of leaded fuel has been a long and challenging process. While most high-income countries banned leaded fuel for on-road vehicles in the 1990s, it continued to be used in many developing countries until more recently. The United Nations Environment Programme (UNEP) played a crucial role in the global effort to rid the world of leaded fuel, working with governments and industries to phase it out.
Today, leaded fuel for cars and trucks has been phased out worldwide, and the use of leaded fuel is largely restricted to aviation, motorsports, and other off-road uses. The successful elimination of leaded fuel from gasoline has improved health, lowered crime rates, and prevented premature deaths, showcasing the importance of shifting away from damaging products for the betterment of global health and the environment.
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The phaseout process
The phase-out process of leaded fuel for cars began in the 1970s, with the EPA issuing the first reduction standards in 1973. This marked the start of a gradual reduction in the allowed lead content in gasoline, aiming to reach one-tenth of a gram per gallon by 1986. The automotive industry responded by developing catalytic converters, which were mandated for cars manufactured from 1975 onwards, as they required lead-free fuel.
By the mid-1980s, most gasoline used in the US was unleaded, and in 1986, the US began phasing out leaded gasoline with the introduction of mid-grade (unleaded) gasoline. During this time, many high-income countries followed suit, banning the use of leaded gasoline for cars. However, it was still widely used in low- and middle-income countries at the turn of the millennium.
In 2002, recognizing the continued use of leaded gasoline globally, the United Nations Environment Programme (UNEP) launched an initiative to work with governments and industries to phase out leaded fuel everywhere. This effort built on the work started by the EPA decades earlier.
The final steps in the phase-out process were taken in 2021 when the sale of leaded gasoline for cars was completely phased out worldwide. The UNEP declared an "official end" to its use in cars on August 30, 2021, marking a significant milestone for global health and the environment.
While leaded gasoline for cars has been eliminated, it is still used in certain sectors, such as aviation, motor sports, and other off-road applications.
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The Clean Air Act
In 1973, three years after the Clean Air Act was passed, the EPA began an effort to phase out leaded gasoline. This was due to a combination of health and environmental concerns. Leaded gasoline, which had been in use since the early 1920s, was known to be toxic and cause a range of health issues.
By the mid-1980s, most gasoline used in vehicles in the US was unleaded, but leaded gasoline was not entirely phased out until 1996. The Clean Air Act Amendments of 1990 played a role in this, with requirements for the EPA to perform periodic benefit-cost analyses of the impact of the regulations. These analyses showed that the Clean Air Act regulations had significant benefits, preventing premature deaths and reducing illnesses, as well as economic benefits.
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Health and environmental concerns
The use of leaded gasoline has been associated with a range of health and environmental concerns. Lead is a highly toxic substance, and its use in gasoline has been linked to a variety of adverse health effects. Even in the early 1920s, soon after the invention of leaded gasoline, the hazards of lead were well-known, with historical figures such as Charles Dickens and Benjamin Franklin writing about the dangers of lead poisoning.
The addition of tetraethyl lead to gasoline was intended to improve engine performance and reduce engine knock, but it also had serious health consequences. Lead poisoning can affect multiple systems in the body, including the nervous system, kidney function, immune system, reproductive and developmental systems, and the cardiovascular system. Elevated blood lead levels can also impair the oxygen-carrying capacity of the blood. Research has linked lead exposure in children to low IQ, developmental problems, permanent nerve damage, anemia, and mental retardation.
The environmental impact of leaded gasoline is also significant. Lead emissions can contaminate air, soil, and water, leading to decreased growth and reproduction in plants and animals, as well as neurological effects in vertebrates. The persistence of lead in the environment poses a long-term threat to ecosystems.
The phase-out of leaded gasoline has had a positive impact on public health and the environment. According to the United Nations, the global elimination of leaded gasoline has saved an estimated $2.44 trillion per year and prevented more than 1.2 million premature deaths. The EPA's efforts to reduce lead emissions in the United States have resulted in a 98% decrease in lead levels in the air between 1980 and 2014, significantly improving air quality and reducing the health risks associated with lead exposure.
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The remaining use of leaded fuel
The use of leaded fuel has been phased out in most countries since the 1970s, with the United States taking the first steps towards this goal. However, some nations, particularly those in the developing world, continued to use leaded fuel for many years. The toxic leaded petrol was finally phased out in Algeria in 2016, marking the end of its use worldwide.
Despite this progress, leaded fuel still finds some limited applications. Aviation fuel, for instance, still contains lead in certain grades. Avgas, a type of aviation fuel, is one such example. Additionally, leaded fuel is used in motor sports and other off-road purposes. Older vehicles with engines designed for leaded fuel can utilise unleaded gasoline with a comparable octane rating or a lead substitute additive, although caution is advised when selecting appropriate additives.
The phase-out of leaded fuel has been a significant environmental and health achievement. The United Nations Environment Programme (UNEP) estimates that the global elimination of leaded fuel saves $2.4 trillion annually and prevents more than 1.2 million premature deaths. The health benefits are particularly notable, as leaded fuel has been linked to heart disease, high blood pressure, strokes, kidney disease, and reduced fertility.
The success in eliminating leaded fuel from the global market has important implications for tackling climate change. It demonstrates the possibility of transitioning consumers and industries away from profitable yet harmful products. However, Rob De Jong of the United Nations Environment Programme (UNEP) cautions that a "two-track" approach, where rich countries address climate change independently, will not suffice for global issues like climate change.
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Frequently asked questions
Yes, the EPA did away with leaded fuel for cars. The phase-out of leaded gasoline was a 25-year effort by the EPA, which concluded in 1996.
Leaded fuel was banned due to health and environmental concerns. Lead is toxic and has been linked to a range of health issues, including heart disease, high blood pressure, strokes, kidney disease, and reduced fertility. It also easily pollutes air, soil, and water.
Leaded fuel, or leaded gasoline, is fuel that has been blended with lead to boost octane levels and improve engine performance.
The use of leaded gasoline began in the 1920s when researchers at General Motors discovered that adding tetraethyl lead to gasoline could improve engine performance and reduce engine knock.
