CO2 emissions from the transport sector attract the attention of both transport and climate change policymakers because of their share of overall emissions and their persistently strong growth. Transport sector emissions grew 1412 million tonnes (31%) worldwide between 1990 and 2003, and increased 820 million tonnes (26%) in OECD countries. The OECD-ECMT region accounts for 71% of worldwide emissions from transport. Transport's share of CO2 emissions is gradually increasing in all the regions of the world; its share of world emissions increased from 22% in 1990 to 24% in 2003. Transport's share is highest in the more developed countries of the OECD (30% in 2003).

URL: http://www.cemt.org/pub/summaries/07CO2summary.pdf