General European Strategic Invt's Inc (GESI)

[ICEQUITY]

SATM "Carbon will be the world's biggest commodity market, and it could become the world's biggest market over all."... "Barclays Capital" (New York Times)

It might be a bit more then that... How Big is the Market for Carbon Credits?
Both the compliance and voluntary markets for carbon offsets are growing.
In 2006, the last year for which verifiable numbers are available, about $5.5 billion of carbon offsets were purchased in the compliance market, representing about 1.6 billion metric tons of CO2 and greenhouse gas reductions.

In 2008, the voluntary market saw about $705 million of carbon offset sales, representing 123.4 million metric tons of CO2 and equivalent gasses.
http://www.no-till-credit.ca/carbon_credits.php

President Barack Obama has said he wants the country to cut emissions of greenhouse gases to 17 percent below 2005 levels by 2020. (Source – Reuters)

http://carboncentralnetwork.blogspot.com/2010/09/buffet-invests-44-billion-in-carbon.html