If you live in Chicago, you may have noticed that many of our city's buses are toting the words "clean air hybrid bus". Starting in 2007, Chicago initiated the use of 20 hybrid busses, and by 2009 the CTA was running more than 200. Compared to the old diesel busses, the CTA's hybrids have a 20% greater fuel efficiency, meaning that less money is spent on fuel and they can go farther with lower amounts of gas. Around when Chicago received their first electric busses, San Francisco did the same. They now have the 3rd largest hybrid bus fleet in the nation. Through running hybrid buses instead of diesel ones, the cost of fuel that needs to be paid by the city is lowered, and the amount of running time for the buses increases. It just goes to show that more and more people are trying to do their part in helping the environment. Sources:
http://www.transitchicago.com/goinggreen/vehicles.aspx
http://www.sfmta.com/cms/mfleet/hybrids.htm
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