A non-renewable energy resource is one that cannot be replaced as it is used. Although fossil fuels, like coal and oil, are in fact fossilized biomass resources, they form at such a slow rate that, in practice, they are non-renewable.
Fuel that is free from mixture or dilution with other fuels.
Fuel-Straight or 100% alcohol (not blended with gasoline), usually in the form of either ethanol or methanol.
Fuel that is virtually free from admixture or dilution.
Vehicles that are powered by compressed or liquefied natural gas.
Pipelines installed for the purpose of transmitting natural gas from a source or sources of supply to one or more distribution centers.
This term generally applies to mains, services, and equipment that carry or control the supply of natural gas from a point of local supply, up to and including the sales meter.
A mixture of gaseous hydrocarbons, primarily methane, occurring naturally in the Earth and used principally as a fuel.
Ambient standards for air pollutants specifically regulated under the CAA. These pollutants include ozone, CO, NO2, lead, PM, and SOx.