information:classification
Alternative energy and propulsion

In Australia, nearly all taxis run on LPG, as well as the growing fleet of hybrids. Argentina and the main cities of Brazil have large fleets of taxis running on natural gas. Many Brazilian taxis are flexible-fuel vehicles running on sugarcane ethanol, and some are equipped to run on either natural gas or as a flex-fuel. At least two Brazilian car makers sell these type of bi-fuel vehicles.

Malaysia and Singapore have many of their taxicabs running on compressed natural gas (CNG).

San Francisco became one of the first cities to introduce hybrids for taxi service in 2005, with a fleet of 15 Ford Escape Hybrids, and by 2009 the original Escape Hybrids were retired after 480,000 km (300,000 mi) per vehicle. In 2007 the city approved the Clean Air Taxi Grant Program in order to encourage cab companies to purchase alternative fuel vehicles, by providing incentives of US$2,000 per new alternative fuel vehicle on a first-come, first-served basis. Out of a total of 1,378 eligible vehicles (wheelchair-accessible taxi-vans are excluded) 788 are alternative fuel vehicles, representing 57% of the San Francisco's taxicab fleet by March 2010. Gasoline-electric hybrids accounted for 657 green taxis and compressed natural gas vehicles for 131.

As of mid-2009 New York City had 2,019 hybrid taxis and 12 clean diesel vehicles, representing 15% of New York's 13,237 taxis in service, the most in any city in North America. At this time owners began retiring its original hybrid fleet after 480,000 and 560,000 km (300,000 and 350,000 mi) per vehicle. Two attempts by the Bloomberg Administration to implement policies to force the replacement of all New York's 13,000 taxis for hybrids by 2012 have been blocked by court rulings.

Chicago is following New York City's lead by proposing a mandate for Chicago's entire fleet of 6,700 taxicabs to become hybrid by 1 January 2014. As of 2008 Chicago's fleet had only 50 hybrid taxicabs. In 2008 Boston mandated that its entire taxi fleet must be converted to hybrids by 2015. Arlington, Virginia also has a small fleet of 85 environmentally friendly hybrid cabs introduced in early 2008. The green taxi expansion is part of a county campaign known as Fresh AIRE, or Arlington Initiative to Reduce Emissions, and included a new all-hybrid taxi company called EnviroCAB, which became the first all-hybrid taxicab fleet in the United States, and the first carbon-negative taxicab company in the world A similar all-hybrid taxicab company, Clean Air Cab, was launched in Phoenix, Arizona in October 2009.

In Japan, electric taxicabs are becoming increasingly popular. In 2009, battery-swap company Better Place teamed with the Japanese government to trial a fleet of electric taxis with the Better Place battery-swap system in Yokohama. In 2010, the taxi company Hinomaru Linousine Company launched two Mitsubishi i MiEV electric taxicabs in Tokyo. Both taxicabs had female drivers and were branded under ZeRO TAXI livery.

Hybrid taxis are becoming more and more common in Canada, with all new taxis in British Columbia being hybrids, or other fuel efficient vehicles, such as the Toyota Prius or Toyota Corolla. Hybrids such as the Ford Escape Hybrid are slowly being added to the taxicab fleet in Mexico City.

Other cities where taxi service is available with hybrid vehicles include Tokyo, London, Sydney, Rome and Singapore. Seoul introduced the first LPI hybrid taxi in December 2009. The internal combustion engine runs on liquefied petroleum gas (LPG) as a fuel.

In 2010 Beijing, China introduced electric taxis. A trial run began in March 2010 with taxis being cheaper than their regular gasoline counterparts.