[1][2] In September 2007 the Arlington County Board authorized EnviroCAB, then a new taxi company, to operate with an all-hybrid fleet of 50 vehicles.

In addition, the Board authorized existing companies permission to add 35 hybrid taxis.

The introduction of green taxis is part of a county campaign known as Fresh AIRE, or Arlington Initiative to Reduce Emissions.

AIRE aims to cut production of greenhouse gases from county buildings and vehicles by 10% by 2012.

Also, EnviroCAB expects to offset the emissions of 100 of the approximately 685 non-hybrid taxis operating in Arlington by March 2008.