Non-CO2 GHGs
Estimates for non-CO2 GHGs for Annex 1 countries are taken from the IPCC’s national reporting (see note 8). Estimates for non-Annex 1 countries come from US Environmental Protection Agency[11] (2011), which contains historical data for every five years from 1990-2005 and projections for 2010-2030. Annual data are interpolated using a spline fit.[12]