Major economies—and thus sources of emissions—are under the remit of city governments: together the top ten cities have an economy larger than Japan; thirty-four of the world’s largest 100 economies are cities.
World’s 100 Top Economies (pdf file)
Country data: GDP-PPP from the Development Data Platform time series, World Bank
City data: PricewaterhouseCoopers (PwC), 2009
Which are the largest city economies in the world and how might this change by 2025? Economic Outlook
Companies: Data retrieved from http://www.forbes.com/lists/2008/18/biz_2000global08_The-Global-2000_Rank.html (accessed November 2009)
Cite as: Hoornweg, D., P. Bhada, M. Freire, C.L. Trejos Gómez, R. Dave. 2010. Cities and Climate Change: An Urgent Agenda. World Bank.