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C40 News Team

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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.

C40 and CDP Kick Off 2016 Reporting Cycle to Help Cities Measure and Manage Their Data

Beginning today, all C40 member cities are invited to report their climate data through our reporting partner CDP. The annual reporting cycle is designed to help cities report their data in a transparent way, and better track the impact of their climate actions. Reporting is also an important requirement for compliance with the Compact of Mayors. Within one year…

Chinese Cities Show Climate Leadership on a Global Stage

By Zachary Tofias, Head of C40’s Sustainable Communities Initiative By 2030, China is expected to have more than one billion urban dwellers, placing increasing pressures on the country’s cities and leaders to think innovatively in taking action against climate change. At the U.S.-China Climate Leaders Summit in Los Angeles in September of last year, Chinese…

Post-COP21, Cities Show Renewed Purpose and Stronger Commitment

By Mark Watts, Executive Director of C40 Cities Climate Leadership Group On December 4th, more than 1,000 mayors, local representatives and community leaders took part in the Climate Summit for Local Leaders convened by Paris Mayor Anne Hidalgo and U.N. Secretary-General’s Special Envoy for Cities and Climate Change Michael Bloomberg. This largest gathering of elected local leaders…

COP21 Video Blog Series: Jesper Nygård, CEO of Realdania, on why cities are critical to tackling climate change

At the start of December 2015, all eyes were on Paris for the COP21 climate negotiations, regarded by many as a pivotal moment in determining global climate action. C40 was fortunate to be there on the ground to help showcase innovative and effective climate actions taking place in the world’s cities. Through a series of…

Groundbreaking C40 Research Proves Cities are Critical

With nearly all the world’s countries signing the Paris Agreement to fight climate change last month, there was also a growing recognition of the role cities are playing in this effort. Suffice it to say, 2015 was a big year for cities and climate change. Relatedly, it was also a big year for the C40…

VIDEO: MasterCard’s Hany Fam & C40’s Mark Watts Discuss Cities & Climate Change at COP21

At the start of December 2015, all eyes were on Paris for the COP21 climate negotiations, regarded by many as a pivotal moment in determining global climate action. C40 was fortunate to be there on the ground to help showcase innovative and effective climate actions taking place in the world’s cities. Through a series of…

VIDEO: President Felipe Calderón, Chair of the Global Commission on the Economy and Climate discusses cities & climate change during COP21 in Paris

At the start of December 2015, all eyes were on Paris for the COP21 climate negotiations, regarded by many as a pivotal moment in determining global climate action. C40 was fortunate to be there on the ground to help showcase innovative and effective climate actions taking place in the world’s cities. Through a series of…

Year in Review: C40 Celebrates 10 Years of City Climate Action

2015 was an important year for C40, and for our mayors. We saw cities firmly establish their place in the global dialogue on climate change, from gathering at the Vatican to committing in large numbers to the Compact of Mayors, culminating in a fantastic series of events at COP21 in Paris. On top of these milestones, 2015 also marked C40’s…

Addition of Auckland brings C40’s global membership to 83 cities

C40 is pleased to welcome Auckland – our first member city from New Zealand – to our global network of cities committed to tackling climate change. Auckland is New Zealand’s largest and most populous city – home to 1.57 million people – and the country’s major economic center.  “Auckland is an exceptionally diverse city made…

Cities continue to show commitment to low emission bus fleets by signing onto the C40 Clean Bus Declaration

Momentum continues to grow for new bus technologies among C40 cities. With the recent addition of Changwon, Hong Kong and Los Angeles, 26 cities have now signed on to the C40 Clean Bus Declaration, demonstrating the market potential for these new technologies to manufacturers. Signatory cities will have over 175,000 buses in their fleet by 2020,…

10 Years of Results: Inspiring Leadership and Transformative Actions in Global Cities

David Miller was C40 Chair 2008 to 2010 and Mayor of Toronto 2003-2010. The C40 is an exceptional organization that brings together leadership from major cities around the world to take real and lasting action on climate change. From the very beginning, when I was asked as Mayor of Toronto to join the Board of…

C40, Germany & IADB Achieve Major Breakthrough For Developing Cities: $1 Billion In Green Infrastructure Unlocked Within Four Years

Green infrastructure is no longer out-of-reach for cities in developing countries thanks to the launch of the C40 Cities Finance Facility, a major project by C40, Germany and Inter-American Development Bank (IADB) to provide the skills, technical assistance and connections to funding opportunities needed to unlock up to $1 billion worth of sustainable infrastructure in cities…

10 Global Cities Win Prestigious C40 Cities Awards

Today, the C40 Cities Climate Leadership Group (C40) announced the winners of the third-annual C40 Cities Awards, recognizing ten global cities for their leadership in tackling climate change across key sectors. The Awards ceremony was held on Thursday night in Paris during the COP21 climate negotiations. Winning cities, including Boston, Johannesburg, Rotterdam and Nanjing each demonstrated…

MasterCard and C40 Partner to Rally Megacities Around Sustainable Mobility

As heads of state gather for the COP21 climate talks in Paris, MasterCard and the C40 Cities Climate Leadership Group (C40) today announced a partnership to connect Chinese and global megacities in a first-of-a-kind ‘Mobility Management’ network. With more than half the world’s population now living in cities, urban transportation is one of the key contributors to CO2 emissions…

Paris Preview: C40 to Highlight Successful City Climate Action at COP21

The highly anticipated international climate negotiations – or COP21 – are underway this week in Paris. C40 mayors from around the world are on their way to Paris to share the story of successful city climate action with the international community, and add to the growing momentum supporting global climate action. C40 will be on…