Statistics Canada
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Table 1.2Global warming potential of greenhouse gases

Global warming potential of greenhouse gases
  100-year global warming potential
  index
Carbon dioxide (CO2) 1
Methane (CH4) 21
Nitrous oxide (N2O) 310
Sulphur hexafluoride (SF 6) 23,900
Hydrofluorocarbons (HFCs) 140 to 11,700
Perfluorocarbons (PFCs) 6,500 to 9,200
Source(s):
Government of Canada, 2006, Greenhouse Gas, Reporting Site, Greenhouse Gas Emissions Reporting: Technical Guidance on Reporting Greenhose Gas Emissions, 2006 Reporting Year (2005 Emissions Data), http://www.ghgreporting.gc.ca/GHGInfo/Pages/page15.aspx (accessed February 25, 2008).