Greenhouse gas emissions are produced from a wide variety of non-energy related industrial activities. The main emission sources are releases from industrial processes that chemically or physically transform materials (e.g., the blast furnace in the iron and steel industry, and ammonia and other chemical products manufactured from fossil fuels and used as chemical feedstock). During these processes, many different GHGs can be produced. In addition, refrigerants also contain GHGs which produce fugitive emissions during use and disposal.
For more information on IPPU calculations please see the Methodology document which can be downloaded from the Resources page.