This is New Zealand’s National Inventory Report for 1990 – 2002 (including the Common Reporting Format (CRF) for 2002). New Zealand’s Greenhouse Gas Inventory is the official annual report of all human-caused emissions and removals of greenhouse gases in New Zealand and is a Tier 1 statistic. The inventory measures New Zealand’s progress against its obligations under the Kyoto Protocol as well as the United Nations Framework Convention on Climate Change (UNFCCC).
Only emissions of carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons and sulphur hexafluoride are included in New Zealand's total emissions figures. Emissions of carbon dioxide, methane and nitrous oxide totalled 99.4% of total emissions in 2002. To compare and total all the emissions from different gases, a Global Warming Potential (GWP) is used to convert all gases back to the equivalent warming effect of carbon dioxide. The GWP's are based on analysis by the IPCC and agreed to by parties to the UNFCCC.