This part of the Danish inventory only comprises data for all substances 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 (see the chart below). This increase is simultaneous with the increase in the emission of HFCs. For the time-series 2000-2009, the increase has been lower than for the years 1995 to 2000. SF₆ contributed considerably in earlier years, with 33 % in 1995. Environmental awareness and regulation of this gas under Danish law has reduced its use in industry. A further result is that the contribution of SF₆ to F-gases in 2009 was only 4.3 %. 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 67 % in 1995, but 94 % in 2009. HFCs are mainly used as a refrigerant. Danish legislation regulates the use of F-gases, e.g. since January 1, 2007 new HFC-based refrigerant stationary systems are forbidden. Refill of old systems are still allowed. The use of air conditioning in mobile systems and the amount of HFC for this purpose increases.

(Click the chart to view the background data)