Environment Canada defines GHG as gases in the atmosphere that trap energy from the sun. Naturally occurring GHGs include water vapour, ozone, carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). Without them, the Earth's average temperature would be about 33°C lower than it is, making the climate too cold to support life (Schneider, 1989). While these naturally occurring gases are what make life possible, a serious concern today is the enhanced effect on the climate system of increased levels of some of these gases in the atmosphere, due mainly to human activities. TPPT in order to meet Canada's GHG reduction targets, Canada monitors six gases (carbon dioxide (COB2B), methane (CHB4B), nitrous oxide (NB2BO), sulphur hexafluoride (SFB6B), perfluerocarbons (PFCs), and hydrofluorocarbons (HFCs)).TPPT Emissions from fossil fuel combustion for transportation include COB2B (94.7%), NB2BO (5.1%) and CHB4B (0.3%).TPPT