Report - DCE - Nationalt Center for Miljø og Energi

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Figure 2.4 NH3 emissions. Distribution on the main sectors (2010) and time series for 1985 to 2010.
2.3 Other air pollutants
2.3.1 Non-Methan Volatile Organic Compounds (NMVOC)
The emissions of Non-Methan Volatile Organic Compounds (NMVOC) originate
from many different sources and can be divided into two main groups:
incomplete combustion and evaporation. Road vehicles and other mobile
sources such as national navigation vessels and off-road machinery are the
main sources of NMVOC emissions from incomplete combustion processes.
Road transportation vehicles are still the main contributors, even though the
emissions have declined since the introduction of catalyst cars in 1990. The
evaporative emissions mainly originate from the use of solvents and the extraction,
handling and storage of oil and natural gas. The emissions from the
energy industries have increased during the nineties due to the increasing
use of stationary gas engines, which have much higher emissions of NMVOC
than conventional boilers. The total anthropogenic emissions have decreased
by 55 % from 1985 to 2010, largely due to the increased use of catalyst cars
and reduced emissions from use of solvents.
Figure 2.5 NMVOC emissions. Distribution according to the main sectors (2010) and time series for 1990 to 2010.
2.3.2 Carbonmonoxid (CO)
Other mobile sources and non-industrial combustion plants contribute significantly
to the total emission of this pollutant. Transport is the second largest
contributor to the total CO emission. In 1990 a law forbidding the burning of
agricultural crop residues on fields was implemented. This caused significant
reduction in CO emission. The emission decreased further by 45 % from 1990
to 2010, largely because of decreasing emissions from road transportation.