Changing Planet

Happy Holidays and a Happy New Year from the C40 News Team

It’s time for the holidays and it is also time for vacation…  So,  for the next two weeks, our blog will highlight C40 news from 2012 that we believe is worth sharing again, including a post from C40 Chair and New York City Mayor Bloomberg; a review of 2012’s critically acclaimed infographics; guest blogs from several of our member cities’ mayors; announcements of new collaborations that will minimize GHG emissions; news on our growing membership; and finally an interview featuring Mayor Bloomberg in which he charges cities with leading the world toward a brighter climate future.

We’ll resume with our regular news coverage the week of Monday, January 7.

Thank you for your continued interest and engagement. And we look forward to bringing you the newest and most important developments and actions being taken by our now 63 city strong global network.

The C40 Cities Climate Leadership Group (C40) is a network of large and engaged cities from around the world committed to implementing meaningful and sustainable climate-related actions locally that will help address climate change globally. Recognizing that cities consume over two-thirds of the world’s energy and account for more than 70% of global CO2 emissions, our organization’s global field staff works with city governments, supported by our technical experts across a range of program areas to reduce carbon emissions and increase energy efficiency in large cities across the world. The current chair of the C40 is Rio de Janeiro Mayor Eduardo Paes, and 108th Mayor of New York City Michael R. Bloomberg is President of the Board. The Steering Committee includes: Berlin, Buenos Aires, Copenhagen, Hong Kong, Houston, Jakarta, Johannesburg, London, Los Angeles, Rio de Janeiro, Seoul and Tokyo.

About the Blog

Researchers, conservationists, and others share stories, insights and ideas about Our Changing Planet, Wildlife & Wild Spaces, and The Human Journey. More than 50,000 comments have been added to 10,000 posts. Explore the list alongside to dive deeper into some of the most popular categories of the National Geographic Society’s conversation platform Voices.

Opinions are those of the blogger and/or the blogger’s organization, and not necessarily those of the National Geographic Society. Posters of blogs and comments are required to observe National Geographic’s community rules and other terms of service.

Voices director: David Braun (

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