Bronte Wells
The transportation sector is a significant contributor to the amount of greenhouse gas emissions we produce, with road vehicles being the biggest culprit. For short to medium distances, walking or cycling is the lowest-carbon way to travel, followed by public transport. Trains are a particularly low-carbon way to travel over moderate to long distances, and are a greener alternative to flying. Electric vehicles are also a lower-carbon option than petrol or diesel cars, especially in countries with a cleaner electricity mix.
| Characteristics | Values |
|---|---|
| Walking or cycling | Lowest carbon way to travel over short to medium distances |
| Trains | Lower-carbon than flying; diesel trains are more polluting than electric trains |
| Boats | Lower-carbon than flying |
| Electric vehicles | Lower-carbon than petrol or diesel cars, especially in countries with a cleaner electricity mix |
| Car-sharing | Reduces carbon footprint and local air pollution |
| Non-stop flights | More environmentally friendly than multi-leg trips |
| Economy class | More environmentally friendly than business or first class |
| Newer planes | More environmentally friendly than older planes |
| Carbon offsets | Help fund green initiatives that reduce or eliminate GHG production |
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What You'll Learn
Walking, cycling, or running
When it comes to carbon emissions, walking and cycling are nearly always the lowest-carbon ways to travel for short to medium distances. Using a bike instead of a car for short trips can reduce travel emissions by around 75%. However, it's important to consider the safety aspects of active travel, as road injuries can be a concern for pedestrians and cyclists.
If you're looking to travel longer distances, taking a train or boat is a more environmentally friendly option than flying. Trains, in particular, are a low-carbon way to travel, and electric trains emit significantly fewer greenhouse gases than short-haul flights. For example, a train journey emits 70% less carbon than a short-haul flight. Additionally, if you're travelling by car, car-sharing can help to reduce your carbon footprint and local air pollution.
In summary, walking, cycling, or running are excellent choices for short to medium distances, while trains are a more sustainable option for longer journeys. By choosing these environmentally conscious travel options, you can play a part in mitigating climate change and improving your health.
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Taking the train
Rail travel is consistently one of the lowest emitters of carbon, and the "flight shame" movement has inspired many to convert from air to rail travel. National rail operator Amtrak reports that its electric trains emit 0.074kg of greenhouse gases per passenger mile, compared to 0.227kg for short-haul flights and 0.137kg for longer flights. That's 70% fewer emissions for a rail journey than a short-haul flight and about half for a long-haul flight.
The type of train is a factor, with diesel trains typically being more polluting than electric trains. However, the source of the electricity can also make a difference. For example, in France, about 75% of electricity comes from nuclear power, whereas in Poland, 80% of grid power is generated from coal.
Overall, taking the train is a much greener option than flying, and often a better choice than driving, especially if travelling alone.
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Driving an electric vehicle
The life cycle emissions of an electric vehicle depend on the source of electricity used to charge it. In areas with low-polluting energy sources, such as renewable resources like wind or solar power, electric vehicles have a significant emissions advantage over conventional gasoline or diesel vehicles. Conversely, in regions relying heavily on conventional electricity generation from fossil fuels, the emissions benefit of electric vehicles may be less pronounced.
It is worth noting that the production of electric vehicles may have a higher carbon footprint than that of gasoline cars due to the additional energy required to manufacture EV batteries. However, over the lifetime of the vehicle, electric vehicles typically produce lower total greenhouse gas emissions. This is because they emit significantly fewer GHGs during operation.
Today, most EV models can travel over 200 miles on a fully charged battery, and new models are expected to have even longer ranges. Electric vehicles also offer flexible charging options, as they can be charged at home, the workplace, or public charging stations. Additionally, electric vehicles can provide significant fuel cost savings due to their high efficiency and the lower cost of electricity compared to gasoline or diesel.
When choosing between driving an electric vehicle and other modes of transportation, it is important to consider the distance and availability of alternatives. For short to medium distances, walking or cycling are often the lowest-carbon options. For longer distances, trains are usually a more environmentally friendly choice than driving, especially when compared to domestic flights.
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Flying—economy class, nonstop, and packed light
When it comes to flying, there are a few strategies to make it more environmentally friendly. Firstly, choosing to fly economy class is a more sustainable option. Economy class is the most affordable and basic option, with limited flexibility and fewer perks compared to higher classes. It is a good choice for travellers who pack light and don't require additional services or amenities. By opting for economy class, you can reduce your carbon footprint as there are standard seats and limited services, which leads to less energy consumption overall.
Additionally, selecting a nonstop flight is another way to make your journey more eco-friendly. Nonstop flights reduce the miles travelled, lowering the carbon emitted per passenger. Each takeoff and landing contributes significantly to carbon emissions, so by eliminating stops, you can decrease your environmental impact.
Furthermore, packing light is also beneficial for the environment. When you bring less luggage, you reduce the overall weight of the aircraft, which can lead to slightly improved fuel efficiency. This small change can collectively make a difference when considering the numerous flights and passengers worldwide.
To further enhance the sustainability of your trip, consider purchasing carbon offsets. Carbon offsets support projects that aim to reduce or capture greenhouse gas emissions. By investing in these initiatives, you can effectively balance out the carbon footprint of your flight, making your journey carbon neutral.
While flying economy class, nonstop, and packing light can reduce your environmental impact, it is worth noting that flying still contributes significantly to greenhouse gas emissions. To further decrease your carbon footprint, consider alternative modes of transportation, such as trains or boats, for international travel, or opt for walking, cycling, or electric vehicles for shorter distances.
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Carbon offsetting
To purchase carbon offsets, individuals can use a carbon footprint calculator to estimate the emissions from their flights, travel, or other activities. They can then buy carbon offsets from a reputable provider that offers high-quality, verified carbon credits. The cost of carbon offsets varies depending on the project and the number of carbon credits purchased. Some projects may be more expensive than others, but there are also economical options available.
While carbon offsetting can be a way to reduce the environmental impact of travel, it is important to note that it is not a perfect solution. One concern is that carbon offsetting can create a moral hazard, shifting the responsibility for reducing emissions to someone else. Additionally, there may be issues with additionality, where the projects would have happened anyway, resulting in no net reduction in emissions. Furthermore, the effectiveness of certain projects, such as forest planting, may be limited by the time it takes for trees to reach their carbon storage capacity.
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Frequently asked questions
Walking or cycling is the lowest-carbon way to travel over short to medium distances. For longer distances, trains are the best option, being much less polluting than flying.
Aviation's emission impacts are much higher on a passenger-kilometre basis. However, the report notes that flying is not necessarily the most harmful choice. Travel by a petrol or diesel-powered car, especially if travelling alone, can be more harmful.
You can purchase carbon offsets that support projects reducing or capturing greenhouse gases. Organisations like CarbonFund.org have initiatives that allow you to contribute donations that go directly towards planting trees.
If you can't walk or cycle, public transport is usually the best option. Car-sharing will also reduce your carbon footprint. When flying, opt for nonstop flights, travel in economy class, and pack light.
