Compressed Natural Gas (CNG)
An alternative fuel for motor vehicles; considered one of the cleanest because of low hydrocarbon emissions and its vapors are relatively non-ozone producing.
Compressed Natural Gas (CNG) - A substitute for gasoline (petrol) or diesel fuels. CNG is considered to be an environmentally 'clean' alternative.
Compressed Natural Gas (CNG): (See alternative fuels.)
Conformity: A demonstration of whether a federally-supported activity is consistent with the State Implementation Plan (SIP) -- per Section 176 (c) of the Clean Air Act.
Alternative Fuels - Fuels that can replace ordinary gasoline, such as compressed natural gas (CNG), alcohols, liquefied petroleum gas (LPG), and electricity.
Blends or substitutes for gasoline fuels, including compressed natural gas, methanol, ethanol, and liquified petroleum gas.
Source: Terms of the Environment
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Fuels which are generally less greenhouse intensive than petrol and diesel, e.g. ethanol and compressed natural gas (CNG)
Anaerobic
Not requiring air or oxygen, used in reference to decomposition processes that occur in the absence of oxygen ...
alternative fuels Substitutes, such as methanol, ethanol, or compressed natural gas, for traditional liquid, oil-derived motor vehicle fuels like gasoline and diesel.
altitude-control valve ...
Clean Fuels- Blends or substitutes for gasoline fuels, including compressed natural gas, methanol, ethanol, and liquified petroleum gas.
Alternative Fuels
Substitutes for traditional liquid, oil-derived motor vehicle fuels like gasoline and diesel. Includes methanol, ethanol, compressed natural gas, and others.(1) ...
Substitutes for traditional liquid, oil-derived motor vehicle fuels like gasoline and diesel. Includes mixtures of alcohol-based fuels with gasoline, methanol, ethanol, compressed natural gas, and others.
 See also: Natural gas, Gas, Emissions, Emission, Well
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