My submission is here.
The crux of the problem is how do you measure methane against CO2 in order to decide how much to reduce each one between now and 2050.
The spreadsheet tracking nz's methane from 1990 to 2050 in real terms is here
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Ten steps to a Post-Carbon World
Note on policies
Climate First has been developing policies over the last two years, and because many of our policies are heavily reliant on analysing emissions statistics, changing greenhouse gas measurements in the NZ Inventory, can render our calculations out of date. Several of our major policy essays are based on the 2013 inventory and projections from the second biennial report. The most important change has been in the 2015 inventory, which lowered values for the whole 1990-2015 time series by about 2 Mtns below the 2014 figures. However as both the base 1990 figure and the current 2015 figures have been reduced, our conclusions remain valid. Because Climate First's policies are based on clear principles, small changes in actual values do not change our fundamental recommendations.