Bangor University’s greenhouse gas (GHG) research has impacted policy and industry through generation of new country-specific nitrous oxide (N2O) emission factors. Policy: Bangor’s evidence has significantly lowered calculated N2O contributions in the UK’s Agriculture GHG Inventory (since submission year 2016), and informed changes to GHG guidelines at the international level (via inclusion in the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories). Industry: Bangor research highlighted that enteric methane represents a greater proportion of the UK’s total Agriculture GHG Inventory than previously thought and worked with red meat / dairy sectors in Wales to enable co-identification of practical GHG emission mitigation practices.