Report - DCE - Nationalt Center for Miljø og Energi

too high. The addition of the category additional buildings is the main reason
for the lowered total emissions from accidental building fires.
For accidental vehicle fires, similar changes were made. Last year the damage
rate was set to 70 % for all fires, but this year the damage rate was divided
in four damage categories according to the measure of fire extinguishing;
full, large, medium and small scale fires, corresponding to 100, 75, 30
and 5 % damage rate respectfully. These new damage categories give an average
burnout for all vehicle categories in 2007-2010 of 34 % and thereby a
reduction in emission of about 50 % compared with the 70 % burnout used
in last year’s inventory. Also the activity data now includes other transport,
trains, ships, airplanes, bicycles, tractors, combined harvesters and machines.
The activity of these eight new categories has a descending trend,
whereas activities that were also included in last year’s inventory have an
increasing trend. The resulting new total emission from accidental vehicle
fires has a relatively constant trend. The joint effect of these two changes in
methodology is an increase in emissions for 1980-1991 and a decrease for
1992-2009. The largest increase is 9 % for all pollutants in 1980 and the largest
decrease is -33 % for all pollutants in 2007, the changes in 1990 and 2009
data are +4 % and -16 % respectively.
The total change in emissions caused by the recalculation of accidental fires
is a decrease in 2009 data between 16 % (particles) and 44 % (NMVOC).