Atmospheric Perfluorocarbons: Sources and Concentrations

摘要: Various emission sources of anthropogenic and natural PFCs are discussed tentatively quantified. New (1999) atmospheric measurements for CF4 C2F6 presented. While there is good evidence that PFC emissions from the production primary aluminium have significantly decreased since late 1980’s growing applications in semiconductor industry recently partly offset these reductions, seems to be a considerable number emitters which can currently not properly Examples more exotic military specialised metallurgical processes. Emissions increasing use refrigeration fire-fighting also poorly characterised. Mainly based on collected observations it estimated during 1990’s total remained fairly constant at annually about 130 million tons carbon dioxide equivalents.