National Inventory Report 1990-2012: Greenhouse Gas Sources and Sinks in Canada - Executive Summary
ES.4 Economic Sectors
As previously noted, there are several methods to categorize the sources of greenhouse gas (GHG) emissions that arise across Canada. For the purposes of analyzing trends and policies, it is useful to allocate emissions to the economic sector from which the emissions originate. These emissions are presented in Figure S-8 and Table S-3. In general, a comprehensive emission profile for a specific economic sector is developed by reallocating the relevant proportion of emissions from various Intergovernmental Panel on Climate Change (IPCC) subcategories. This reallocation simply re-categorizes emissions under different headings and does not change the overall magnitude of Canadian emissions estimates.
Total: 699 Mt CO2 eq
Long Description for Figure S-8This pie chart presents the breakdown of greenhouse gas (GHG) emissions in megatonnes of carbon dioxide equivalent (Mt CO2 eq) and in percentages (%) by economic sector for 2012. Canada’s total GHG emissions in 2012 were estimated to be 699 Mt. The breakdown is based on the following seven economic sectors: the Oil and Gas Sector, which accounted for the largest contribution at 173 Mt or 25% of total emissions; Transportation (165 Mt or 24%); Electricity (86 Mt or 12%); Buildings (80 Mt or 11%); Emissions Intensive and Trade Exposed Industries (78 Mt or 11%); Agriculture (69 Mt or 10%); and Waste (47 Mt or 7%).
Oil and Gas
Emissions Intensive & Trade Exposed IndustriesFootnote a
Waste & OthersFootnote b
National GHG Total
- Footnote n
Note: Totals may not add up due to rounding.
Estimates presented here are under continual improvement. Historical emissions may be changed in future publications as new data become available and methods and models are refined and improved. Recalculations resulting from methodological improvements are presented in Chapter 9, and recalculations resulting from changes to underlying activity data are presented in the chapter(s) associated with the sector where the changes occurred (Chapters 3-8).
- Footnote a
The Emissions Intensive & Trade Exposed Industries represent emissions arising from non oil and gas mining activities, smelting and refining, and the production and processing of industrial goods such as paper or cement.
- Footnote b
"Others" includes Coal Production, Light Manufacturing, Construction & Forest Resources.
Similar to the trends under IPCC sectors, the increase in GHG emissions between 1990 and 2012 was driven by growth in the oil and gas and transportation sectors. Increased production of crude oil as well as the expansion of the oil sands resulted in an increase in emissions of 72 megatonnes (Mt) in the oil and gas sector. In the transportation sector, changes in subsectors such as light-duty and heavy-duty vehicles caused an increase in emissions of 37 Mt when compared to 1990 levels. These increases were offset by decreases in emissions in the Electricity and Emissions Intensive and Trade Exposed Industries, where emissions fell 6 Mt and 17 Mt, respectively.
Further information on the IPCC and economic sector definitions and trends, as well as a detailed cross-walk between IPCC and economic sector categories, can be found in Chapter 2, Table 2-14.
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