Unlike in other sectors, CO2 emissions from transport rose between 1990 and 2000 by more than 12%. The primary reason is the increased transport volume: between 1990 and 2000, the increase in freight transport alone was around 41%. During the same period, the increase in passenger transport, measured in passenger kilometres, was around 22% [VIZ, 2001/2002]. It was not until after 1999 that there was a slight drop in CO2 emissions from transport, largely due to a drop in vehicle kilometres in passenger transport.