Bronte Wells
The transport sector is a significant contributor to global emissions, accounting for around 21% of total emissions. Road travel is responsible for the majority of transport emissions, with passenger vehicles and trucks producing almost half of these emissions. Within the category of passenger vehicles, various factors influence the level of pollution, including the type of vehicle, its fuel, fuel economy, and annual mileage. While luxury sports cars are notorious for their high emissions, SUVs and pickup trucks are also high-polluting vehicles that have gained popularity worldwide. Electric vehicles (EVs) offer a promising alternative, producing zero tailpipe emissions, although they do generate emissions during the production and distribution of electricity. As the world transitions to lower-carbon energy sources, the rise of electric vehicles and the development of new technologies provide a pathway towards reducing emissions from the transport sector.
| Characteristics | Values |
|---|---|
| Vehicle with most global emissions | Pickup trucks |
| Vehicle type with most CO2 emissions | Luxury sports cars |
| Brand with highest NEDC | Bugatti |
| Brand with second-highest NEDC | Rolls Royce |
| Vehicle with most tailpipe pollution | Ford |
| Sector with most emissions | Transport sector |
| Sub-sector with most emissions | Road transport |
| Type of vehicle that accounts for most of road transport emissions | Passenger vehicles (cars and buses) |
| Type of vehicle that is the second-largest contributor to road transport emissions | Trucks carrying freight |
| Type of vehicle with least emissions | Electric vehicles |
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What You'll Learn
SUVs and sports cars emit high levels of CO2
The transport sector accounts for 21% of global emissions, with road transport contributing to three-quarters of this figure. Passenger vehicles, including cars and buses, are responsible for 45.1% of transport emissions, while trucks carrying freight contribute 29.4%.
Among passenger vehicles, SUVs and sports cars are notable for their high levels of CO2 emissions. The combustion-related CO2 emissions of SUVs increased by nearly 70 million tonnes between 2021 and 2022, with the 330 million SUVs on the road today emitting nearly 1 billion tonnes of CO2 annually. This increase in emissions is due in part to the rising popularity of SUVs, which now account for around 46% of global car sales. The average SUV consumes around 20% more oil and emits 20% more CO2 than a medium-size non-SUV car. If SUV emissions were compared to country emissions, they would be the world's fifth-largest emitter of CO2, surpassing the emissions of Japan, Germany, and South Korea.
The popularity of high-polluting vehicles like SUVs continues to rise despite the EU setting stricter limits on car emissions to tackle high CO2 levels. This trend is concerning, given that SUVs require larger batteries and place additional pressure on battery supply chains, further increasing the demand for critical minerals needed to make batteries.
While electric vehicles (EVs) offer a viable option to reduce emissions, it is important to note that they are not a perfect solution. EVs emit small amounts of greenhouse gases due to air conditioner leaks, and the production and distribution of electricity used to fuel them can also create emissions. Nevertheless, the shift towards electric cars is a key part of reaching net-zero emissions by the middle of the century.
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Pickup trucks produce the most emissions
Trucks are known to be less fuel-efficient than smaller cars. The 2019 Ford Ranger achieves 23 miles per gallon, while the 2019 Chevy Colorado diesel reaches 20 miles per gallon in the city and 30 miles per gallon on the highway. The average gasoline vehicle has a fuel economy of about 22.2 miles per gallon. Electric vehicles, on the other hand, have no tailpipe emissions, although emissions are generated during the production and distribution of their electricity.
Pickup trucks are also associated with aftermarket modifications that increase emissions. Some truck owners intentionally modify their diesel engines to increase pollution, a practice that is more common in states without regular vehicle inspections. The US Environmental Protection Agency estimates that 550,000 medium pickup trucks have disabled emissions controls, resulting in 570,000 tons of excess NOx and 5,000 tons of excess diesel particulate emissions over their lifetimes. This is the equivalent of adding over 9 million additional compliant diesel pickup trucks to the roads.
Furthermore, a recent study by the International Council on Clean Transportation found that diesel pickup trucks from Ford, Ram, GMC, and Chevrolet emit on average nearly five times above the US EPA emissions limit in real-world driving conditions. Ford trucks, in particular, were found to emit between three to ten times more harmful nitrogen oxide (NOx) emissions than other similarly-sized trucks. Long-term exposure to these pollutants is linked to adverse health outcomes, including disability and years of life lost due to stroke, heart disease, and lung cancer.
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Rail travel emits very little
The type of vehicle that pollutes the most is a complicated question. Road travel accounts for three-quarters of transport emissions, with passenger vehicles such as cars and buses contributing 45.1% and trucks carrying freight contributing 29.4%. The entire transport sector accounts for 21% of total emissions, with road transport making up 15% of this.
However, it is worth noting that pickup trucks and SUVs produce the most emissions on average, and their popularity is increasing worldwide.
When it comes to rail travel, the picture is more positive. Rail travel and freight emit very little, only 1% of transport emissions. Electric trains, in particular, have no direct carbon emissions as they are powered by internal electric motors. With the development of clean energy generation, electric trains can operate with a very low environmental impact. For example, a proposed high-speed rail line between San Francisco and Los Angeles could be powered by renewable energy sources, resulting in zero greenhouse gas emissions.
While freight trains can cause pollution and health issues, particularly in communities of color and low-income communities, there is a push for cleaner, zero-emission locomotives. In California, for instance, steps are being taken to fund cleaner locomotives, reduce rail idling near homes and schools, and promote the turnover of older, polluting trains.
Additionally, rail travel is often a more climate-friendly option compared to air travel. Amtrak, for instance, is a cleaner option than flying when its tracks are electrified, as in the Northeast Corridor from Washington to Boston. However, outside of this region, Amtrak trains often run on diesel, a highly polluting fuel.
Overall, while rail travel emits very little in the way of pollution, there is still room for improvement, especially in the case of freight trains and diesel-powered trains.
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Electric vehicles have no tailpipe emissions
Electric vehicles (EVs) have zero tailpipe emissions, meaning they produce no harmful gases from the exhaust during operation. This is in stark contrast to gasoline cars, which emit smog, NOx, and other pollutants that can make the surrounding air difficult or dangerous to breathe. Gasoline cars' tailpipe emissions contribute significantly to their overall lifetime emissions, with more than 50% stemming from day-to-day use.
However, it's important to note that electric vehicles do contribute to emissions during the production and distribution of the electricity used to power them. The amount of carbon pollution generated in this process varies depending on the energy sources used for electricity generation. For example, coal and natural gas power plants emit carbon pollution, whereas renewable sources like wind or solar power do not.
The shift towards electric vehicles is a positive step towards reducing emissions from passenger vehicles. As the world transitions to cleaner energy sources, the upstream emissions associated with electric vehicles will decrease. This is particularly true in regions with relatively low-polluting energy sources, where electric vehicles can offer a significant life cycle emissions advantage over conventional gasoline or diesel vehicles.
While electric vehicles may start with a carbon emissions "debt" due to the energy-intensive nature of battery manufacturing, they quickly catch up to and surpass gasoline cars in terms of environmental friendliness. Over the lifetime of an electric vehicle, total greenhouse gas emissions associated with manufacturing, charging, and driving are typically lower than those of a gasoline car. This is because electric vehicles have zero tailpipe emissions and generally produce fewer greenhouse gases during operation.
Additionally, electric vehicles can be charged at off-peak times, such as overnight, when rates are often cheaper and renewable energy sources like solar power are more readily available. This further reduces the environmental impact of electric vehicles and helps to alleviate concerns about the strain on the power grid caused by the increasing number of electric vehicles entering the market.
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Luxury sports cars are huge polluters
Road travel accounts for three-quarters of transport emissions, with passenger vehicles and freight trucks being the main contributors. While pickup trucks produce the most emissions on average, luxury sports cars are also huge polluters.
Bugatti, Rolls Royce, Lamborghini, Ferrari, and Chevy are some of the car brands that emit the most carbon dioxide. These highly expensive car brands produce high levels of pollution, with Bugatti receiving the highest NEDC with an average of 0.52 kg/km, much higher than any other brand.
Luxury sports cars tend to have larger engines and are designed for speed and performance rather than fuel efficiency. As a result, they burn more fuel and emit higher levels of carbon dioxide and other greenhouse gases. In addition to carbon dioxide, gasoline-powered vehicles also emit methane, nitrous oxide, and hydrofluorocarbon from leaking air conditioners.
The environmental impact of luxury sports cars extends beyond just their tailpipe emissions. The production and distribution of the vehicles themselves, as well as the extraction and shipping of petroleum products used as fuel, also contribute to their overall environmental footprint. Furthermore, at the end of their lifespan, cars can leave behind plastic, toxic battery acids, and other products that can stay in the environment for a long time.
While electric vehicles (EVs) are a more environmentally friendly alternative as they produce zero tailpipe emissions, they still contribute to emissions during their production and when charged with electricity generated by non-renewable resources. However, with the world shifting towards lower-carbon electricity sources, electric vehicles offer a promising option to reduce emissions from passenger vehicles in the future.
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Frequently asked questions
Road vehicles are the biggest polluters, accounting for 75% of transport emissions. Within this category, passenger vehicles like cars and buses are the worst offenders, making up 45.1% of transport emissions. Newly registered luxury cars produce the most CO2 per car, with sports car brand Bugatti receiving the highest NEDC with an average of 0.52 kg/km. SUVs are also high-polluting vehicles that are increasing in popularity.
Planes have long been blamed for greenhouse emissions and global warming, but according to the latest data, they are not the worst offenders. Aviation accounts for 11.6% of transport emissions, emitting just under 1 billion tonnes of CO2 each year, which is around 2.5% of total global emissions.
Rail travel and freight emit very little, only 1% of transport emissions. International shipping contributes 10.6% of transport emissions.
Electric vehicles (EVs) have no tailpipe emissions, but emissions are created during the production and distribution of the electricity used to fuel the vehicle.
The way you drive can directly influence how much gasoline your car uses and, therefore, the emissions it generates. Eco-friendly driving habits can help reduce emissions, and when it's time for a new car, buy the greenest car you can afford.
