Freight Transportation GHG Emissions by Energy Source and Transportation Mode
  1990   1991 1992 1993 1994 1995 1996 1997 1998
Freight Transportation GHG Emissions (Mt of CO2e)a,b 47.7   45.7 47.2 48.5 53.5 54.9 56.4 59.5 61.9

GHG Emissions by Energy Source (Mt of CO2e)a,b
Natural Gas 0.0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Motor Gasoline 11.4   11.1 11.8 12.4 13.7 13.6 14.5 15.0 15.7
Diesel Fuel Oil 30.3   28.0 28.8 30.5 33.7 35.4 36.1 38.7 39.6
Ethanol n.a.   n.a. n.a. n.a. n.a. n.a. n.a. n.a. n.a.
Biodiesel Fuel 0.0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Light Fuel Oil and Kerosene 0.0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Heavy Fuel Oil 4.6   5.1 5.0 4.3 4.6 4.3 4.2 4.3 5.2
Aviation Gasoline 0.0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Aviation Turbo Fuel 0.5   0.4 0.4 0.4 0.5 0.5 0.6 0.6 0.5
Propane 1.0   1.0 1.2 0.9 0.9 1.0 1.0 0.9 0.9

GHG Emissions by Transportation Mode (Mt of CO2e)a,b
Light Trucks 6.7   6.6 7.1 7.1 7.8 8.2 8.6 9.2 9.8
Medium Trucks 8.2   8.2 8.6 9.0 9.7 10.1 10.2 10.6 11.0
Heavy Trucks 17.8   16.1 16.5 18.3 21.1 22.4 23.7 25.7 26.4
Air 0.5   0.4 0.4 0.4 0.5 0.5 0.6 0.6 0.5
Rail 6.7   6.2 6.5 6.5 6.7 6.1 5.9 6.0 5.9
Marine 7.9   8.2 8.1 7.1 7.7 7.5 7.4 7.4 8.3
GHG Intensity (tonne/TJ)a,b 71.2   71.2 71.2 71.1 71.1 71.0 71.0 71.1 71.4

Sources:

a) Natural Resources Canada, Transportation End-Use Model, Ottawa, 2018.
b) Environment and Climate Change Canada, National Inventory Report 1990–2016: Greenhouse Gas Sources and Sinks in Canada, Ottawa, 2018.