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. 2009 Feb;117(2):A62–A68. doi: 10.1289/ehp.117-a62

Transaction volume by project location, over-the-counter projects, 2007

Asia 39%
North America 27%
Europe and Russia 13%
Australia 7%
Latin America 7%
Other 5%
Africa 2%

Adapted from: Hamilton K, Sjardin M, Marcello T, Xu G. 2008. Forging a frontier: state of the voluntary carbon markets 2008. San Francisco, CA: Ecosystem Marketplace; p. 7.