◄Previous: 5.4 Cheating on emission standards

# 6 Lower-carbon fuels

An alternative approach to cutting CO2 emissions is the use of transport fuels with a lower CO2 emission factor. Two fossil fuel options for internal combustion engines are compressed natural gas (CNG) and liquefied petroleum gas (LPG). Other options are renewable liquid biofuels derived from plant or animal sources.

◄Contents►Next: 6.1 CNG and LPG vehicles

OpenLearn - Transport and Sustainability
Except for third party materials and otherwise, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence, full copyright detail can be found in the acknowledgements section. Please see full copyright statement for details.