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HFCs, PFCs and SF6

This part of the Danish inventory only comprises data for all sub-stances from 1995. From 1995 to 2000, there has been a continuous and substantial increase in the contribution from F-gases as a whole, calculated as the sum of emissions in CO2 equivalents (The Figure). This increase is simultaneous with the increase in the emission of HFCs. For the time-series 2000-2004, the increase has been much lower than for the years 1995 to 2000. SF6 contributed considerably in earlier years, with 52% in 1993. Environmental awareness and regula-tion of this gas under Danish law has reduced its use in industry, with the result that the contribution in 2004 was approximately 4%. The use of HFCs, and especially HFC-134a as a major contributor to HFCs, has increased several fold. HFCs have, therefore, become dominant F-gases, comprising 48% in 1993, but 94% in 2004. HFC-134a is mainly used as a refrigerant. However, the the use of HFC-134a as a refrigerant, as well as the use of other HFCs as refrigerants, is stable or falling. This is due to Danish legislation, which, in 2007, forbids new HFC-based refrigerant stationary systems. On the other hand, the use of air conditioning in mobile systems is on the increase.

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