This document discusses the importance of developing regional greenhouse gas emission factors. It notes that current models for estimating emissions from agriculture are likely using incorrect emission factors from other regions. Preliminary data from Africa and Asia show emissions can be 10-40% higher than IPCC estimates for livestock manure and 1-10% higher for N2O from cropping systems. More accurate regional factors are needed for national greenhouse gas inventories, climate policies, and verifying if practices promoted as "climate smart" truly mitigate emissions given local conditions and management.