Taxicabs of the United Kingdom the comic book "Hellblazer", Chas Chandler's job as a taxi driver is the basis for various plot elements of the series. The Knowledge, its runs, and to a certain extent the role of the PCO, form the basis for a future religion in Will Self's "The Book of Dave". The Taxi and Private Hire office is the body responsible for licensing taxicabs within Greater London. Taxi and Private Hire is part of Transport for London and is responsible for licensing the familiar London taxicab or "black cab" and also licenses private hire or minicab services. "Black cabs" were traditionally coloured
Hybrid taxi hybrids. Clean Air Cab claims to be a carbon-neutral taxi service. In addition to lowering emissions with its hybrid fleet, the company purchases carbon offsets and supports global reforestation by subsidizing the planting of 10 Brazilian rainforest trees monthly for each cab in service. Through an ordinance, the city of San Antonio, Texas introduced a voluntary program in 2007 that allows taxi owners to swap the permit of one non-hybrid car for two permits valid only for hybrid electric vehicles. To prevent one fleet from obtaining all the permits, the largest company is allowed to replace only 1% of its