Carbon Reduction Programs

United States
http://www.scientificamerican.com/article.cfm?id=first-carbon-tariff-will-tax-co2-at-2010-01  
The first (U.S.) carbon tax to reduce…greenhouse gases from imports comes not between two nations, but between two states. Minnesota has passed a measure to stop carbon at its border with North Dakota. To encourage the switch to clean renewable energy Minnesota plans to add a carbon fee of between $4 and $34 per ton of carbon dioxide emissions...

http://www.reuters.com/article/idUSTRE54R4YP20090528?loomia_ow=t0:s0:a49:g43:r1:c1.000000:b29655796:z0 
Emissions traders expect U.S. carbon market soon...

Europe
http://ec.europa.eu/environment/climat/emission/index_en.htm  
European Union Greenhouse Gas Emission Trading System (EU ETS) 

Canada
http://gas2.org/2008/04/05/canada-unleashes-first-carbon-tax-in-n-america/  
Canada Unleashes First Carbon Tax in N. America