Countries vary across the globe in releases of greenhouse gases (GHG). For example, eight countries -- USA (23.5), Canada (22.6), Czech Republic (13.7), UK (10.6), Spain (10.1), Switzerland (7.3), South Africa (9.0), and Thailand (5.6) -- released in 2005 their portion of per capita carbon dioxide emissions in metric tons as shown inside the parentheses. The data are from the World Resource Institute and exclude bunker-fuel emissions and land-use change. Just USA, EU, Canada, Czech Republic, Switzerland, South Africa, and Thailand contributed on the same basis 43.4% of the total global emissions in 2006 per U.S. Department of Energy.