Average fuel efficiency of light-duty vehicles with the model year 1990 for all populated regions of Canada is shown on this map. Light-duty vehicles include all cars and light trucks. There are significant spatial variations throughout Canada. The areas with the high average fuel efficiency are urban areas. Generally, fuel efficiency increases from west to east across Canada. Because vehicles consume a substantial part of energy in Canada, average vehicle fuel efficiency is an important indicator for greenhouse gas emission and climate change policy making. The lower the fuel efficiency, the higher the emission per vehicle, and, consequently, the greater the contribution to greenhouse gases.