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.

Automobile

An automobile is a vehicle that moves itself rather than being moved by another vehicle or animal. A motor car is usually shortened to just car. A car is a wheeled passenger vehicle that carries its own engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally for the transport of people rather than goods. An automobile, usually called a car or a truck, is a wheeled vehicle that carries its own engine. Older terms include horseless carriage and motor car. It has seats for the driver and, almost without exception, for at least one passenger. Significant reductions in death and injury have come from the addition of Safety belts and laws in many countries to require vehicle occupants to wear them. Airbags and specialised child restraint systems have improved on that. Structural changes such as side-impact protection bars in the doors and side panels of the car mitigate the effect of impacts to the side of the vehicle. Many cars now include radar or sonar detectors mounted to the rear of the car to warn the driver if he or she is about to reverse into an obstacle or a pedestrian. Some vehicle manufacturers are producing cars with devices that also measure the proximity to obstacles and other vehicles in front of the car and are using these to apply the brakes when a collision is inevitable. There have also been limited efforts to use heads up displays and thermal imaging technologies similar to those used in military aircraft to provide the driver with a better view of the road at night.

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