Although there are different types of fuel that makes cars run, most are based on gasoline or diesel. The US Environmental Protection Agency states that the average car emits 887 grams of carbon dioxide 8 per gallon of gasoline. The average driving vehicle in diesel fuel will emit 10,180 grams of carbon dioxide. Many governments use tax policies (such as the US excise tax or fuel tax) to influence decisions to purchase vehicles with low levels of CO2 often result in tax cuts. Fuel taxes can encourage the production of more efficient and therefore less polluting hybrid vehicles (eg hybrids) and the development of alternative fuels. High fuel taxes can strongly encourage consumers to buy lighter, smaller and more fuel efficient or non-driving cars. On average, cars today are about 75 percent recyclable, and the use of recycled steel helps reduce energy consumption and pollution. In the United States Congress, fuel efficiency standards imposed by the federal government have been the subject of regular debate, norms for passenger vehicles have not exceeded the standards of 27.5 mpg (86 l / 100 km) have changed more frequently, and were set at 22.2 mpg (10.6 l / 100 km, 26.7 mpg imp) in 2007.
Vehicle manufacturing requires a lot of resources and many manufacturers now report on the environmental performance of their plants, including energy consumption, waste and water consumption.
The growth in popularity of the car has allowed cities to spread, further promote the car trip resulting in inactivity and obesity, which in turn can lead to increased risk of various diseases.
Transportation (of all types, including trucks, buses and cars) contributes significantly to air pollution in most industrialized countries. According to the US Surface Transportation Policy Project, nearly half of all Americans are breathing contaminated air. Their study showed that the air quality in the metropolitan areas of dozens has worsened in the last decade.
Animals and plants are often adversely affected by automobiles due to habitat destruction and pollution. During the life of an average car, the “potential habitat loss” may exceed 50,000 m2 (540,000 square feet) based on primary production correlations. Animals die every year on road cars, called “Roadkill”. The most recent major road improvements include environmental mitigation measures in their plans, such as green bridges, to allow wildlife passage and the creation of wildlife corridors.
The growing popularity of vehicles and travel resulted in traffic jams. Brussels is considered the most congested city in Europe in 2011 according to TomTom