A green vehicle is a vehicle that is considered to be more "environmentally friendly" than traditional all-petroleum internal combustion engine vehicles. This is accomplished by having a low dust to dust energy cost. It provides a way of sustainable transport. The United States Environmental Protection Agency (EPA) is promoting the marketing of greener cars via the Smart Way program. The Smart Way and Smart Way 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 Smart Way 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. Smart Way Elite is given to those vehicles that score 9 or better on both the Greenhouse Gas and Air Pollution Scores.

Luxury SUV

A luxury SUV is a North American term for sport utility vehicles which have features that resemble other luxury vehicles. They are relatively expensive and have a higher emphasis and premium on comfort, quality, style and engineering, than their mainstream counterparts. Even though luxury SUVs do not necessarily feature more comfort or a higher quality than sedans, they tend to be more expensive than luxury sedans. The top-of-the-line SUVs of American and Japanese luxury car makers out price their flagship sedans. The flagship SUV Cadillac Escalade is a luxury SUV. In European automakers, where the flagship sedans are still priced above the top-of-the-line SUV. Mid-level luxury SUVs feature base MSRP's ranging approximately between $40K to $80K. Vehicles in this category include: Audi Q7, Porsche Cayenne S, Acura MDX, Cadillac Escalade, Volkswagen Touareg, Mercedes-Benz M-Class, Mercedes-Benz GL-Class, Volvo XC90, Saab 9-7X, Lincoln Navigator, Land Rover LR3, Land Rover Range Rover Sport, Lexus GX, Lexus RX 400h, BMW X5, Infiniti QX56, Toyota Land Cruiser, Toyota Prado and Infiniti FX. High-end luxury SUVs. Vehicles in this category include: Mercedes-Benz G-Class, Lexus LX, Porsche Cayenne Turbo, and Land Rover Range Rover.