The Large Cities Climate Leadership Group, also known as the C40 Cities (and originally as the C20 Cities) is a group of cities working to reduce urban carbon emissions and to adapt to climate change. It believes it has an important role to play as cities contain around 50% of the world's population, consume 75% of the world's energy, and produce 80% of its greenhouse gases.[1] The Group's secretariat is based in London.
The group was founded after a meeting of delegations from 18 cities at the October 2005 World Cities Leadership Climate Change Summit, organised by the Mayor of London.
On August 1, 2006, the Group signed a memorandum of understanding with the William J. Clinton Foundation's Climate Initiative,[2] under which the Clinton Foundation will provide technical and communications support.
The Group held their first summit in 2005 in London and their second in 2007 in New York.[3] At the second summit, 13 cities joined the group.[4] The third summit was in May 18–21, 2009 in Seoul. Next forth summit will be held in 2011 in São Paulo.
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Amsterdam
Austin
Barcelona
Changwon
Copenhagen
Curitiba
Heidelberg
Lagos
New Orleans
Portland
Rotterdam
Salt Lake
City
San Francisco
Seattle
Stockholm
Yokohama
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