Figure 6: Regional greenhouse gas emissions trends in Belgium.

The assumed base year for CO2, CH4 and N2O emissions is 1990. For fluorinated gases (HFC, PFC and SF6) on the other hand, the assumed base year is 1995. The index value 100 on the Y-axis corresponds to the sum of CO2, CH4 and N2O emissions in 1990 and HFC, PFC and SF6 emissions in 1995. All three curves thus represent the total emissions of greenhouse gasses according to two different time references. Since there is no difference between emissions of fluorinated gasses in the Walloon Region and the Brussels-Capital Region between 1990 and 1995, 1990 equals 100 %. However, due to an increase in fluorinated gas emissions in the Flemish Region during the same period, the total of greenhouse gas emissions in 1990 is less than 100 % in this region.

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