1. Intergovernmental Panel on Climate Change. Climate change 2007: the physical science basis, summary for policymakers. Geneva, Switzerland: IPCC Secretariat; 2007. See also: 〈http://www.ipcc.ch/SPM2feb07.pdf〉.
2. Environment Canada. National inventory report, 1990–2004—greenhouse gas sources and sinks in Canada. Ottawa, Ontario: Greenhouse Gas Division, Environment Canada; 2006. See also: 〈http://www.ec.gc.ca/pdb/ghg/inventory_report/2004_report/2004_report_e.pdf〉.
3. Emera Inc. Emera 2004 progress report. Halifax, NS: Emera Inc.; 2004. See also: 〈http://www.emera.com/investors/annual_report.shtml〉.
4. Office of Energy Efficiency. Table 5: secondary energy use and GHG emissions by end-use and energy source—excluding electricity-related emissions. Comprehensive Energy Use Database Tables. Ottawa, Ontario: Natural Resources Canada; 2005. See also: 〈http://oee.nrcan.gc.ca/corporate/statistics/neud/dpa/tablestrends2/agr_atl_1_e_2.cfm?attr=0〉.
5. Statistics Canada. Farm operating expenses and depreciation charges. Ottawa, Ontario: Minister of Industry; 2006. See also: 〈http://www.statcan.ca/english/freepub/21-012-XIE/21-012-XIE2006002.pdf〉.