The automobile has come a long way since the days of the first car in 1886. It has undergone many improvements in its power, comfort, safety and appearance. At a certain point, people also began to worry about its impact on the environment. All types of vehicles emit greenhouse gases into the air in varying amounts. Many regulations have been introduced stating the permissible amount of these gases a vehicle can produce and thus forcing car manufacturers to make their vehicles more environmentally friendly. In addition to reducing the amount of greenhouse gases, the United States is trying to reduce its dependence on foreign oil. In the past, the most common way to address both issues was to make cars more fuel efficient. However, in recent times, electric vehicles or electric vehicles have received the most attention. Although electric vehicles have improved and become more accessible to the consumer, we should not rely solely on them and research, improve and finance other technologies, such as internal combustion engines or gas-powered vehicles. hydrogen. Many aspects limit the use of electric vehicles and their relevance as the only solution to the proposed problems. One of the biggest obstacles concerns batteries used in cars powered by electricity. They are heavy and even though “electric motors are about four times more efficient than internal combustion engines”, “gasoline still has an energy density 20 times higher than that of batteries” (Bryce). Additionally, the range (around 100 miles) that batteries are capable of providing a vehicle is not comparable to the range of around 400 miles that a vehicle equipped with an internal combustion engine (ICE) can offer. Additionally, it takes a few hours to recharge a battery, but less than five million paper......hicles. " Renewable Energy. 2012. Opposing Views in Context. Web. Nov. 19, 2013. Burns, Lawrence D., McCormick, J. Byron, and Borroni-Bird, Christopher E. “Vehicle of Change.” Scientific American. October 2002 : 64-73. Web. November 19, 2013. Fuhrmans, Vanessa. “Hydrogen Fuel Cells Are Down, But Maybe Not Out.” Better Mileage Now.” Scientific American. February 2010: 50-55. Mufson, Steven. “The Car of the Future – But at What Cost? “The Washington Post. November 25, 2008. ProQuest. Web. November 19, 2013. Ogden, Joan. “High hopes for hydrogen. » Scientific American. September 2006: 94-101. Web. November 19, 2013. Paine, Chris. “5 myths about electric cars”. The Washington Post, April 28 2013.. 2013.