Gasoline – means any petroleum distillate or petroleum distillate/oxygenated blend having a Reid vapor pressure of four pounds per square inch (207 millimeters of mercury) absolute or greater, and commonly or commercially known or sold as gasoline.

Greenhouse Effect – The warming of the Earth's atmosphere attributed to a buildup of carbon dioxide or other gases. Some scientists think that this build-up allows the sun's rays to heat the Earth, while making the infra-red radiation atmosphere opaque to infra-red radiation, thereby preventing a counterbalancing loss of heat.

Greenhouse Gas – A gas, such as carbon dioxide or methane, which contributes to potential climate change.

Gross Vehicle Weight Rating (GVWR) – means the value specified by the manufacturer as the maximum design loaded weight of a single vehicle.