These indicators show the GHG emissions reported by economic sector in which they are generated. They show how energy efficiency in the economy has improved while producing goods and services for our consumption and export. Key results - In 2019, the oil and gas sector and transport sector were the largest GHG emitters in Canada. Together, they accounted for 52% of total emissions - The other Canadian economic sectors each accounted for between 7.0% and 12% of total GHG emissions in Canada