It now hosts the world's biggest carbon-trading exchange and has a profitable line in renewable-energy finance.

ECONOMIST: Renewable energy

Germany's four big power producers have undertaken to post weekly production figures on the website of a second carbon-trading exchange, the European Energy Exchange in Leipzig.

ECONOMIST: Buttonwood

Established in 2003, CCX aspires to be the New York Stock Exchange for carbon offset trading.

FORBES: Magazine Article

He proposes making a deal with Democrats in which some of the Bush tax cuts become permanent in exchange for a carbon tax to deal with the global-warming crisis.

NEWYORKER: On the Bus

As planned, these members would "purchase" carbon offsets on the CCX trading exchange and make contributions to, or investments in, organizations that provide "alternative" or "renewable" energy.

FORBES: Magazine Article

Evolution has taken a 15% stake in a new carbon-trading venture called Green Exchange, a joint venture with Nymex and rivals, including Credit Suisse and JPmorgan Chase.

FORBES: Magazine Article

New Mexico has joined the Chicago Climate Exchange, pledging to reduce its carbon emissions, and at the same time becoming a national leader in creating a state-of-the-art clean energy economy.

CNN: Redford: Kicking the oil habit

Encouraged by this flurry, the Sydney futures exchange now wants to create an electronic market for trading carbon credits.

ECONOMIST: The rise of the sink