Economic and Policy Implications of Alternative GHG Metrics
Agriculture emits a range of greenhouse gases. Evaluating the effectiveness of mitigation strategies requires a way to compare the contribution of individual gases to overall emissions. This is usually done by converting emissions of methane and nitrous oxide into so-called "carbon dioxide equivalents" using a simple multiplier.
However, there is more way than one to compare apples and oranges, and the same applies to different greenhouse gases. This fact sheet describes the most common equivalence metric, the Global Warming Potential, used by the UNFCCC and in the Kyoto Protocol. Alternative metrics exist though and could give very different weight in particular to methane. The fact sheet highlights the potential implications of alternative metrics - globally, and for New Zealand - for our collective efforts to limit greenhouse gas emissions and projected climate change at least cost.
Download fact sheet 3 (high res) (2.79MB)
Download fact sheet 3 (low res) (0.83MB)
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