Shawn Urbanski, Research Scientist with the USDA Forest Service Rocky Mountain Research Station presented the latest research in emission factors. Emission factors are a key component to estimating emissions of trace gases and particulates from fire. Shawn discussed how emission factors are measured, factors that influence the measurements (e.g. fire combustion phase, vegetation type), lab/field/airborne/tower measurement techniques, and the new suite of non-methane organic compounds now detectable.