America's Dirtiest Vehicles

Nobody want to be known as the most dirty, at least when it comes to air pollution.

The good news is that since 1975, total emissions of new passenger cars to reduce greenhouse gas emissions and higher fuel efficiency. This trend seems to continue, partly based on technological change, government regulation slightly higher, and in part by consumer interest and demand.

Electric, hybrid vehicles and alternative fuels has received considerable attention this year, and undertake to remain in the spotlight during 2012. But most new light vehicles sold next year will probably be powered by traditional fuel combustion engine internals. As shown promising new technology, manufacturers and regulators should continue to focus on improving the efficiency and cleanliness of gas engines have a significant impact on air quality.

The National Highway Traffic Safety Administration (NHTSA) has given an average of the Company's new fuel economy (CAFE) for model year 2012-2016 passenger cars and light trucks, in coordination with the Environmental Protection Agency (EPA), provided by national authorities gases house gases (GHG) emissions standards.

Special version of the exhaust of the car is carbon dioxide (CO2), and for good reason: "CO2 emissions make up 95-99% of total greenhouse gas emissions from a passenger CH4 (methane), N2O (nitrous oxide.) And HFC emissions (AC refrigerant) account for approximately 1 to 5% of greenhouse gas emissions of passenger cars in total, and then considering the global warming potential of each greenhouse gas, "according to the EPA publications.

To determine the list of dirtiest U.S. vehicles in 2012, we have the basis of data from NHTSA's fuel economy rating and EPA's Green Guide for vehicles, two publicly available sources. Also use carbon footprint calculator, which helps to translate information from EPA to the size of metric tons of CO2 emissions. As in the past, has issued heavy vehicles (which currently are not subject to federal regulations on fuel economy) and vehicles are considered "exotic" like the Bugatti Veyron. Almost all foreign vehicles was ranked as the dirtiest car in its class, with a focus on performance in fuel consumption is concerned. Due to low volume and small distance driven per year, the environmental impact is not popular in the production of exotic vehicles, and environmental concerns are rarely part of the decision to buy exotic.

EPA and NHTSA estimates are based on the assumption that the vehicle is driven 15,000 miles per year and that 55% of the miles are miles from town, with 45% classified as miles of roads. By means of the carbon footprint, calculate the metric tons of CO2 emissions based on equal annual estimate of 15,000 miles. We use EPA's Air Pollution Scale, which is a Standard Carbon-containing compounds (including hydrocarbons) "auto tailpipe emissions that contribute to local and regional air pollution.", Nitrogen oxides, particulates, carbon monoxide and formaldehyde. Results are presented as the sum total of points from 1 to 10, with "1" represents the minimum passing score and "10" represents a perfect score, with no tailpipe emissions at all. We use the California standards, the most stringent in the U.S. for 2012.

EPA figures the first hurdle. Vehicles with the (worst) score the lowest compared based on their CO2 emissions. Vehicles with the dirtiest emissions determined from the Class.

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