C40 is a network of the world’s megacities taking action to reduce greenhouse gas emissions. With a unique set of assets, the C40 works with participating cities to address climate risks and impacts locally and globally.
C40 is committed to implementing meaningful and sustainable climate-related actions locally that will help address climate change globally. Their global field staff works with city governments, supported by their technical experts across a range of program areas. Together they facilitate active exchange and collaboration across their cities.
C40 was created in 2005 by former Mayor of London Ken Livingstone, and forged a partnership in 2006 with the Cities Program of President Clinton’s Climate Initiative (CCI) to reduce carbon emissions and increase energy efficiency in large cities across the world. Under the leadership of then Mayor of Toronto David Miller, who served after Mayor Livingstone as C40 Chair, the organisation advanced programs and partnerships that drew international recognition for the role of cities as leaders in climate action.
The current chair of C40 is New York City Mayor Michael R. Bloomberg who leads the C40 together with the steering committee and executive leadership team.