Established alternatives to car use include cycling, walking, kick scooters, rollerblading, skateboarding, twikes and (electric or internal combustion) motorcycles.
Personal rapid transit is a scheme that has been discussed, in which small, automated vehicles would run on special elevated tracks spaced within walking distance throughout a city, and could provide direct service to a chosen station without stops.
However, despite several concepts existing for decades personal rapid transit has failed to gain significant ground and several prototypes and experimental systems have been dismantled as failures.
That said, the degree of local air pollution varies considerably depending on which fuel (i.e. gasoline, LPG, CNG/biogas, hydrogen) is injected to the internal combustion engine.
Also, velomobiles exist (including electric assisted versions), which compared to regular bicycles have the benefit of being enclosed (hence protecting the driver from the weather), and the potential of being motorized, which can allow one to travel greater distances (at a faster speed).