Because of this emissions in 1999 cannot yet be compared with previous years. Emissions in 1990 - 1998 are being recalculated now using the new method and are expected to be ready during 2001. The major sources of CO 2 emissions are the combustion of fossil fuels and the use of fuels for mobile sources. International bunkers are not included. The major source of SO 2 emissions is combustion of fossil fuels.
Road traffic is the major source of NO X emissions.
Agriculture is the major source of CH 4 and N 2 O emissions.