The Chicago Climate Exchange has companies and other organizations assume voluntary targets for reductions in their greenhouse gas emissions.
The BBC's Mark Georgiou said there was an "almost Glastonbury atmosphere" at the demonstration outside the European Climate Exchange, which featured "music and meditation".
Then there's the Nobel laureate Al Gore himself, now an exceedingly wealthy founder of Generation Investment Management, a green business broker and major stockholder in the Chicago Climate Exchange.
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.
Big winners will include companies like General Electric and Siemens, that make advanced generating equipment, and companies that can reduce emissions and sell the excess on markets like the Chicago Climate Exchange.
The remaining 20% is traded on a handful of exchanges, of which the most active is the European Climate Exchange, which is based in Amsterdam but trades through a platform in London.
Ferretti, vice president at the Chicago Climate Exchange, extolled emissions trading, noting that the practice had helped bring sulfur dioxide and acid rain under control much less expensively than traditional command-and-control regulation.
The Chicago Climate Exchange (CCX) has shut its doors in response to a different sort of climate change--one producing a cold political Northern that blew into the Windy City from the Great Plains and beyond on Nov. 2.
Meanwhile, Viloria said the foreign-exchange market has factored in a weak economic climate for Europe.
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Last week, the Securities and Exchange Commission ordered private companies to publish estimates of the climate-related risks they face.
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In 2010, the U.S. Securities and Exchange Commission required publicly traded companies to disclose to their investors all financially material climate-related risks, including those linked to water availability and quality.
Programmes target a wide range of national, regional and global challenges such as climate change, ocean health and fisheries, disaster warning and mitigation, capacity building, and data availability and exchange.
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