The Chicago Climate Exchange (CCX) was a voluntary, legally binding greenhouse gas reduction and trading system for emission sources and offset projects in North America and Brazil. CCX employed independent verification, included six greenhouse gases, and traded greenhouse gas emission allowances from 2003 to 2010. The companies joining the exchange committed to reducing their aggregate emissions by 6% by 2010. CCX had an aggregate baseline of 680 million metric tons of equivalent. CCX ceased trading carbon credits at the end of 2010 due to inactivity in the U.S. carbon markets, although carbon exchanges were intended to still be facilitated. History Until 2010 CCX was operated by the public company Climate Exchange PLC, which also owned the European Climate Exchange. Richard Sandor, creator of the Sustainable Performance Group, founded the exchange and has been a spokesman for it. The exchange traded in emissions of six gases: carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, perfluorocarbons and hydrofluorocarbons. CCX started trading in October 2003, prior to the commencement of trading in the European Union through the ETS system. The Valley Wood Carbon Sequestration Project, the first such project to be verified through the Chicago Climate Exchange, was the recipient of offset funding generated through a unique partnership, developed in 2008 by Verus Carbon Neutral, that brought together 17 merchants of Atlanta's Virginia-Highland shopping and dining neighborhood retail district to establish the first Carbon Neutral Zone in the United States. IntercontinentalExchange (), a leading operator of regulated global futures exchanges, clearing houses and over-the-counter (OTC) markets, announced that it had agreed on terms to acquire Climate Exchange plc, the acquisition was completed in July 2010 and was followed by an announcement that half of the company's Chicago-based workforce would be laid off due to inactivity in the U.S. carbon markets. In November 2010, the Climate Exchange stated that it would cease trading carbon credits at the end of 2010, although carbon exchanges will still be facilitated. Final trading position The effective final CFI position was reached in November 2010 when the carbon credit price per metric ton of CO2 was between 5 and 10 US cents, down from its highest value of 750 US cents in May 2008. Trading reached zero monthly volume in February 2010 and remained at zero for the next nine months when the decision to close the exchange was announced. Components of the trading system The trading system had the