Changes

A '''hybrid electric vehicle''' is any car that uses an [[electric motor]], [[battery (electrical)|battery]] and [[internal combustion engine]] as power sources. Hybrids have been around almost as long as cars, but have only recently become common. Buyers were initially given a federal tax break, but these ended on December 31, 2010.<ref>[http://www.hybridcars.com/federal-incentives.html Hybrid Car Tax Credits: Incentives Fade into Memory] Hybridcars.com, February 7, 2011, retrieved August 20, 2011</ref> A federal transportation bill in August 2005 allowed individual states to issue permits to owners of hybrid cars to travel in High Occupancy Vehicle (HOV) lanes with only one person in the vehicle.<ref>[http://www.hybridcars.com/local-incentives/carpool-hov-lanes.html Carpool HOV Lanes] Hybridcars.com, July 8, 2010, retrieved August 20, 2011</ref> This political move occurred even though the hybrid cars' gas mileage reduces during steady speed driving.  Hybrids are usually popular with [[Hollywood]] celebrities, [[homosexuals]] and [[liberals]], but can also be popular with [[conservatives]]. The most popular hybrid is the [[Toyota Prius]]. Historically, sales of hybrid cars in the United States tend to increase when gas prices are above three dollars a gallon.<ref name="Prius">[http://www.nytimes.com/2007/07/04/business/worldbusiness/04iht-hybrid.4.6491389.html Toyota's hybrid car more than a mixed success] Maynard, Micheline, July 4, 2007, The ''New York Times'', retrieved August 20, 2011</ref>

A '''hybrid electric vehicle''' is any car that uses an [[electric motor]], [[battery (electrical)|battery]] and [[internal combustion engine]] as power sources. Hybrids have been around almost as long as cars, but have only recently become common. Buyers were initially given a federal tax break, but these ended on December 31, 2010.<ref>[http://www.hybridcars.com/federal-incentives.html Hybrid Car Tax Credits: Incentives Fade into Memory] Hybridcars.com, February 7, 2011, retrieved August 20, 2011</ref> A federal transportation bill in August 2005 allowed individual states to issue permits to owners of hybrid cars to travel in High Occupancy Vehicle [[HOV lanes|(HOV) lanes]] with only one person in the vehicle.<ref>[http://www.hybridcars.com/local-incentives/carpool-hov-lanes.html Carpool HOV Lanes] Hybridcars.com, July 8, 2010, retrieved August 20, 2011</ref> This political move occurred even though the hybrid cars' gas mileage reduces during steady speed driving.  Hybrids are usually popular with [[Hollywood]] celebrities, [[homosexuals]] and [[liberals]], but can also be popular with [[conservatives]]. The most popular hybrid is the [[Toyota Prius]]. Historically, sales of hybrid cars in the United States tend to increase when gas prices are above three dollars a gallon.<ref name="Prius">[http://www.nytimes.com/2007/07/04/business/worldbusiness/04iht-hybrid.4.6491389.html Toyota's hybrid car more than a mixed success] Maynard, Micheline, July 4, 2007, The ''New York Times'', retrieved August 20, 2011</ref>

==How they work==

==How they work==