Question: Considering that estimated emission quantities based on 2006 IPCC guidelines would be different than those based on revised 1996 guidelines due to the difference in emission factors, how the Non-Annex I countries could deal with the challenge of modifying their NDCs which are prepared based on the revised 1996 IPCC guidelines, considering the capacity constraints they have?
• As noted in 2006 guidelines and the 2006 IPCC guidelines primer, for many categories the methods have not changed, but emission factors may have been updated in the 2006 IPCC guidelines. It is good practice to recalculate estimates of all previous inventories, or the time series when you introduce a methodological refinement, and/or an updated or new data is available. Tools like the IPCC Inventory Software, which is based on the 2006 IPCC guidelines can help facilitate this work.