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ENDNOTES
- Carbon dioxide equivalent (CO2-e) provides the basis for comparing the warming effect of different greenhouse gases. Different greenhouse gases have different effects and remain in the atmosphere for different periods of time. A tonne of methane, for example, contributes as much to global warming as 21 tonnes of carbon dioxide and thus has a Global Warming Potential (GWP) of 21, compared to carbon dioxide's GWP of 1. Each gas has a GWP so that each can be converted to a common CO2 equivalent (CO2-e). This enables emissions of different greenhouse gases to be compared by converting them to carbon dioxide equivalents (CO2-e).
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This page last updated 9 January 2013
Net greenhouse gas emissions(a)
Footnote(s): (a) Excluding emissions from the land use, land use change and forestry sector.
Source(s): Department of Climate Change and Energy Efficiency, 2010, National Greenhouse Gas Inventory, May 2010