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Agreen vehicle,clean vehicle,eco-friendly vehicle orenvironmentally friendly vehicle is a roadmotor vehicle that produces less harmful impacts to theenvironment than comparable conventionalinternal combustion engine vehicles running ongasoline ordiesel, or one that uses certainalternative fuels.^[3][4] Presently, in some countries the term is used for any vehicle complying or surpassing the more stringentEuropean emission standards (such as Euro6), orCalifornia'szero-emissions vehicle standards (such asZEV,ULEV,SULEV,PZEV), or thelow-carbon fuel standards enacted in several countries.^[5]

Green vehicles can be powered byalternative fuels and advanced vehicle technologies and includehybrid electric vehicles,plug-in hybrid electric vehicles,battery electric vehicles,compressed-air vehicles,hydrogen andfuel-cell vehicles,neat ethanol vehicles,flexible-fuel vehicles,natural gas vehicles,clean diesel vehicles, and some sources also include vehicles using blends ofbiodiesel andethanol fuel orgasohol.^[4][6] In 2021, with anEPA-rated fuel economy of 142miles per gallon gasoline equivalent (mpg-e) (1.7 L/100 km), the 2021Tesla Model 3 Standard Range Plus RWD became the most efficient EPA-certified vehicle considering all fuels and all years, surpassing the 2020Tesla Model 3 Standard Range Plus and 2019Hyundai Ioniq Electric.^[7]

Several authors also include conventional motor vehicles with highfuel economy, as they consider that increasing fuel economy is the mostcost-effective way to improveenergy efficiency and reduce carbon emissions in the transport sector in the short run.^[8] As part of their contribution tosustainable transport, these vehicles reduceair pollution andgreenhouse gas emissions, and contribute toenergy independence by reducing oil imports.^[4][8]

An environmental analysis extends beyond just the operating efficiency and emissions. Alife-cycle assessment involves production and post-use considerations. Acradle-to-cradle design is more important than a focus on a single factor such as energy efficiency.^[9][10]

Cars with similar production of energy costs can be obtained, during the life of the car (operational phase), large reductions in energy costs through several measures:

• The most significant is by usingalternative propulsion:
  • An efficient engine that reduces the vehicle's consumption ofpetroleum (i.e.petroleum electric hybrid vehicle), or that usesrenewable energy sources throughout its working life.
  • Usingbiofuels instead of petroleum fuels.
• Proper maintenance of a vehicle such as enginetune-ups,oil changes, and maintaining propertire pressure can also help.
• Removing unnecessary items from a vehicle reduces weight and improves fuel economy as well.

Sales of both theChevrolet Voltplug-in hybrid (top) and theNissan Leafall-electric car (bottom) began in December 2010.

Green vehicles include vehicles types that function fully or partly on alternative energy sources other thanfossil fuel or lesscarbon-intensive than gasoline or diesel.

Another option is the use ofalternative fuel composition in conventional fossil fuel-based vehicles, making them function partially on renewable energy sources. Other approaches includepersonal rapid transit, apublic transportation concept that offers automated, on-demand, and non-stop transportation on a network of specially built guideways.

Examples of vehicles with reduced petroleum consumption includeelectric cars,plug-in hybrids andfuel cell-poweredhydrogen cars are provided to the right.

Electric cars are typically more efficient thanfuel cell-powered vehicles on aTank-to-wheel basis.^[15] They have betterfuel economy than conventionalinternal combustion engine vehicles but are hampered byrange or maximum distance attainable before discharging the battery. Theelectric car batteries are their main cost. They provide a 0%^[16] to 99.9% reduction inCO₂ emissions compared to anICE (gasoline, diesel) vehicle, depending on the source of electricity.^[17]

Hybrid cars may be partly fossil fuel (or biofuel) powered and partly electric or hydrogen-powered. Most combine an internal combustion engine with an electric engine, though other variations too exist. The internal combustion engine is often either a gasoline or Diesel engine (in rare cases a Stirling engine may even be used^[18]). They are more expensive to purchase but cost redemption is achieved in a period of about 5 years due to better fuel economy.^[13][14]

Compressed air cars,Stirling powered vehicles, andliquid nitrogen vehicles are less polluting than electrical vehicles, since the vehicle and its components are environment friendly^{[citation needed]}.

Solar car races are held on a regular basis in order to promote green vehicles and other "green technology". These sleek driver-only vehicles can travel long distances at highway speeds using only the electricity generated from the sun.

A conventional vehicle can become a greener vehicle by mixing inrenewable fuels or using less carbon intensivefossil fuel. Typicalgasoline-powered cars can tolerate up to 10%ethanol. Brazil manufactured cars that run on neat ethanol, though there were discontinued. Another available option is aflexible-fuel vehicle which allows any blend of gasoline and ethanol, up to 85% in North America and Europe, and up to 100% in Brazil.^[19] Another existing option is to convert a conventional gasoline-powered to allow the alternative use ofCNG.Pakistan,Argentina,Brazil,Iran,India,Italy, andChina have the largest fleets ofnatural gas vehicles in the world.^[20]

Diesel-powered vehicles can often transition completely tobiodiesel, though the fuel is a very strongsolvent, which can occasionally damagerubber seals in vehicles built before 1994. More commonly, however, biodiesel causes problems simply because it removes all of the built-up residue in an engine, cloggingfilters, unless care is taken when switching from dirty fossil-fuel derived diesel to bio-diesel. It is very effective at 'de-coking' the diesel engines combustion chambers and keeping them clean. Biodiesel is the lowest emission fuel available for diesel engines. Diesel engines are the most efficient car internal combustion engines. Biodiesel is the only fuel allowed in some North American national parks because spillages will completely bio-degrade within 21 days. Biodiesel andvegetable oil fuelled, diesel engined vehicles have been declared amongst the greenest in the USTour de Sol competition.

This presents problems, as biofuels can use food resources in order to provide mechanical energy for vehicles. Many experts point to this as a reason for growing food prices, particularly US Bio-ethanol fuel production which has affected maize prices. In order to have a low environmental impact, biofuels should be made only from waste products, or from new sources likealgae.

Multiple companies are offering and developing two, three, and four wheel vehicles combining the characteristics of a bicycle with electric motors. US Federal, State and Local laws do not clearly nor consistently classify^[21] these vehicles asbicycles,electric bicycles,motorcycles,electric motorcycles,mopeds,Neighborhood Electric Vehicle,motorised quadricycle or as acar. Some laws have limits on top speeds, power of the motors, range, etc., while others do not.^{[22][23][24][25]}

• Public transportation vehicles are not usually included in the green vehicle category, butPersonal rapid transit (PRT) vehicles probably should be. All vehicles that are powered from the track have the advantage of potentially being able to use any source of electric energy, including sustainable ones, rather than requiring liquid fuels. They can also switch regenerative braking energy between vehicles and the electric grid rather than requiring energy storage on the vehicles. Also, they can potentially use the entire track area for solar collectors, not just the vehicle surface. The potentialPRT energy efficiency is much higher than that which traditional automobiles can attain.
• Solar vehicles areelectric vehicles powered bysolar energy obtained fromsolar panels on the surface (generally, the roof) of the vehicle.Photovoltaic (PV) cells convert the Sun's energy directly intoelectrical energy. Solar vehicles are not practical day-to-day transportation devices at present, but are primarily demonstration vehicles and engineering exercises, often sponsored by government agencies. However, some cities have begun offeringsolar-powered buses, including theTindo inAdelaide, Australia.
• Wind-powered electric vehicles primarily use wind-turbines installed at a strategic point of the vehicle, which are then converted into electric energy which causes the vehicle to propel.

Horse and carriage are just one type of animal propelled vehicle. Once a common form of transportation, they became far less common as cities grew and automobiles took their place. In dense cities, the waste produced by large numbers of transportation animals was a significant health problem. Oftentimes the food is produced for them using diesel powered tractors, and thus, there is some environmental impact as a result of their use.

Human-powered transport includes walking,bicycles,velomobiles,row boats, and more environmentally friendly ways of getting around. In addition to the health benefits of the exercise provided, they are far more environmentally friendly than most other options. The only downside is the speed limitations, and how far one can travel before getting exhausted.

Vehicle emissions contribute to the increasing concentration of gases linked toclimate change.^[26] In order of significance, the principalgreenhouse gases associated with road transport are carbon dioxide (CO₂), methane (CH₄) andnitrous oxide (N₂O).^[27] Road transport is the third largest source of greenhouse gases emitted in the UK, and accounts for about 27% of total emissions,^[28] and 33% in the United States.^[29] Of the totalgreenhouse gas emissions from transport, over 85% are due to CO₂ emissions from road vehicles. The transport sector is the fastest growing source of greenhouse gases.^[30]

Vehicle pollutants have been linked to human ill health including the incidence of respiratory and cardiopulmonary disease and lung cancer. A 1998 report estimated that up to 24,000 people die prematurely each year in the UK as a direct result of air pollution.^[31] According to theWorld Health Organization, up to 13,000 deaths per year among children (aged 0–4 years) across Europe are directly attributable to outdoor pollution. The organization estimates that if pollution levels were returned to within EU limits, more than 5,000 of these lives could be saved each year.

Hybrid taxifleet operators inNew York have also reported that reduced fuel consumption saves them thousands of dollars per year.^[32]

A study by CNW Marketing Research suggested that the extra energy cost of manufacture, shipping, disposal, and the short lives of some of these types of vehicle (particularly gas-electrichybrid vehicles) outweighs any energy savings made by their using less petroleum during their useful lifespan.^[33] This type of argument is the long smokestack argument.^[34] Critics of the report note that the study prorated all of Toyota's hybrid research-and-development costs across the relatively small number of Priuses on the road, rather than using the incremental cost of building a vehicle; used109,000 miles (175,000 km) for the length of life of a Prius (Toyota offers a 150,000-mile (240,000 km) warranty on the Prius' hybrid components, including the battery), and calculated that a majority of a car's cradle-to-grave energy gets expended during the vehicle's production, not while it is driven.^[35]Norwegian Consumer Ombudsman official Bente Øverli stated that "cars cannot do anything good for the environment except less damage than others." Based on this opinion, Norwegian law severely restricts the use of "greenwashing" to market automobiles, strongly prohibiting advertising a vehicle as being environmentally friendly, with large fines issued to violators.^{[36][37][38][39]}

Some studies try to compare environmental impact of electric and petrol vehicles over complete life cycle, including production, operation, and dismantling.^{[40][41][42][43]}In general, results differ vastly dependent on the region considered, due to difference in energy sources to produce electricity that fuels electric vehicles. When considering only CO₂ emissions, it is noted that production of electric cars generate about twice as much emissions as that of internal combustion cars.^[40] However, emissions of CO₂ during operation are much larger (on average) than during production. For electric cars, emissions caused during operation depend on energy sources used to produce electricity and thus vary a lot geographically. Studies suggest that when taking into account both production and operation, electric cars would cause more emissions in economies where production of electricity is not clean, e.g., it is mostly coal based.^[41][42] For this reason, some studies found that driving electric cars is less environmentally damaging in western US states than in eastern ones, where less electricity is produced using cleaner sources. Similarly, in countries like India, Australia or China, where large portion of electricity is produced by using coal, driving electric vehicles would cause larger environmental damage than driving petrol vehicles. When justifying use of electric cars over petrol cars, these kinds of studies do not provide sufficiently clear results. Environmental impact is calculated based on fuel mix used to produce electricity that powers electric cars. However, when a gas vehicle is replaced by an equivalent electric vehicle, additional power must be installed in electrical grid. This additional capacity would normally not be based on the same ratios of energy sources ("clean" versusfossil fuels) than the current capacity. Only when additional electricity production capacity installed to switch from petrol to electric vehicles would predominantly consist of clean sources, switch to electric vehicles could reduce environmental damage. Another common problem in methodology used in comparative studies is that it only focuses on specific kinds of environmental impact. While some studies focus only on emission of gas pollutants over life cycle or only on greenhouse gas emissions such as CO2, comparison should also account for other environmental impacts such as pollutants released otherwise during production and operation or ingredients that can not be effectively recycled.^[44] Examples include use of lighter high performing metals, lithium batteries and more rare metals in electric cars, which all have high environmental impact.

A study that also looked at factors other than energy consumption and carbon emissions has suggested that there is no such thing as an environmentally friendly car.^[45]

The use of vehicles with increasedfuel efficiency is usually considered positive in the short term but criticism of any hydrocarbon-based personal transport remains. TheJevons paradox suggests that energy efficiency programs are often counter-productive, even increasing energy consumption in the long run.^[46] Many environmental researchers believe thatsustainable transport may require a move away from hydrocarbon fuels and from our present automobile and highway paradigm.^[47][48][49]

TheEuropean Union is promoting the marketing of greener cars via a combination of binding and non-binding measures.^[50] As of September 2025, 19 of the 27member states of the European Union provide tax incentives forelectrically chargeable vehicles and somealternative fuel vehicles, which includes all EU countries exceptGermany,Denmark,Italy,Finland,Slovakia,Bulgaria,Latvia andRomania. The incentives consist of tax reductions and exemptions, as well as of bonus payments for buyers ofelectric cars,plug-in hybrids,hybrid electric vehicles andnatural gas vehicles.^[51]

TheUnited States Environmental Protection Agency (EPA) is promoting the marketing of greener cars via theSmartWay program. The SmartWay and SmartWay Elite designation mean that a vehicle is a better environmental performer relative to other vehicles. This US EPA designation is arrived at by taking into account a vehicle's Air Pollution Score and Greenhouse Gas Score. Higher Air Pollution Scores indicate vehicles that emit lower amounts of pollutants that cause smog relative to other vehicles. Higher Greenhouse Gas Scores indicate vehicles that emit lower amounts of carbon dioxide and have improved fuel economy relative to other vehicles.

To earn the SmartWay designation, a vehicle must earn at least a 6 on the Air Pollution Score and at least a 6 on the Greenhouse Gas Score, but have a combined score of at least 13. SmartWay Elite is given to those vehicles that score 9 or better on both the Greenhouse Gas and Air Pollution Scores.

A Green Vehicle Marketing Alliance, in conjunction with theOak Ridge National Laboratory (ORNL), periodically meets, and coordinates marketing efforts.^[52]

This section needs to beupdated. Please help update this article to reflect recent events or newly available information.(February 2022)

Several automobile magazines, motor vehicle specialized publications andenvironmental groups publish annual rankings or listings of the best greencars of a given year. The following table presents a selection of the annual top pickings.

Dedicatedelectric and green vehicle motor shows:

• Alternative Vehicle and Fuel Show (AVFS),Fair of Valladolid, Spain, in November.^[108]
• Green Fleet Expo,Royal Botanical Gardens (Ontario), in May.^[109]
• Green-Car-Guide Live!,Arena and Convention Centre inLiverpool, in June^[110]
• Electric & Hybrid Vehicle Technology Expo, (Sindelfingen, Germany, April / Novi,Detroit, Michigan, September).[2]Archived 2019-06-28 at theWayback Machine
• European Electric Motor Show,Helsinki Exhibition & Convention Centre, in November^{[111][112][113]}

This sectionneeds expansion. You can help byadding to it.(June 2008)

• Leitman, Seth; Brant, Bob (October 2008).Build Your Own Electric Vehicle, 2nd Edition.McGraw-Hill, Inc.ISBN 978-0-07-154373-6.
• Tobin Smith; Jim Woods; Liz Claman (2008)."Waving the Green Flag, Clean Transportation".Billion Dollar Green. John Wiley and Sons. pp. 35–46.ISBN 978-0-470-34377-7.
• DFE2008 Automobile Engines, Wikiversity

Wikinews has news related to:

Alternative propulsion

• 2013 VehicleTechnologies Market Report,Oak Ridge National Laboratory
• Alternative Fuels and Advanced Vehicle Data Center
• AU Green Vehicle Guide
• Clean Car Calculator (Institute for Energy Efficiency)
• Clean Cities - 2014 Vehicle Buyer's Guide,National Renewable Energy Laboratory (NREL),U.S. Department of Energy,Clean Cities program. December 2013.
• Cradle-to-Grave Lifecycle Analysis of U.S. Light-Duty Vehicle-Fuel Pathways: A Greenhouse Gas Emissions and Economic Assessment of Current (2015) and Future (2025-2030) TechnologiesArchived 2020-08-12 at theWayback Machine (includes estimated cost of avoided GHG emissions from different AFV technologies),Argonne National Laboratory, June 2016.
• Earth cars
• EPA Green Vehicle Guide
• Green Cars (Autocar)
• Green Car Center (Yahoo)
• Green Car GuideArchived 2014-02-07 at theWayback Machine.
• Infographic: Green Cars 101 (2011)
• Green cars and eco drivingArchived 2013-01-21 atarchive.today
• Green ProgressArchived 2020-07-29 at theWayback Machine
• Model Year 2014 Fuel Economy Guide,U.S. Environmental Protection Agency andU.S. Department of Energy, April 2014.
• Progressive Insurance Automotive X PRIZE homepage
• Small Efficient Vehicles Wiki: People's Car Project
• State of Charge: Electric Vehicles’ Global Warming Emissions and Fuel-Cost Savings across the United StatesArchived 2012-10-21 at theWayback Machine (UCS)
• Top Ten EPA-Rated Fuel Sippers (2016) - including BEVs and PHEVs
• UCS Hybrid ScorecardArchived 2012-05-18 at theWayback Machine (Union of Concerned Scientists)

• Green vehicles

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