A description of good examples of technical measures to reduce anthropogenic emissions of methane and their economic aspects. Relevant methane emitting sectors identified are ruminant livestock, manure management, landfill, waste water treatment, waste management and oil and gas systems. The consultancy firm Ramböll is responsible for the production of the catalogue, initiated by the Nordic Climate and Air Pollution Group (KOL) under the auspices of the Nordic Council of Ministers.