"Alternative fuel" means fuel that is

(a) for use in motor vehicles to deliver direct propulsion,

(b) less damaging to the environment than conventional fuels, and

(c) prescribed by regulation,

including, without limiting the generality of the foregoing, ethanol, methanol, propane gas, natural gas, hydrogen or electricity when used as a sole source of direct propulsion energy.

Source: Canadian Alternative Fuels Act.

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