Introduction

The NAEI reports estimates of the UK emissions of a number of gaseous pollutants. Estimates are calculated for each source category based on its fuel consumption or other activity statistics. These are then summed to obtain a total emission for the UK. This Appendix describes the methodology used to estimate the emissions and is laid out according to source category. The inventory is revised on an annual basis and the methodology described here is that of the 1998 Inventory. All revisions are applied to the full time series back to the earliest year, 1970. The pollutants discussed here are given in Table A1 below.