Carbon Neutral Cities Alliance

A project of the Urban Sustainability Directors Network

In partnership with INC and C40

A collaboration of international cities committed to achieving aggressive long-term carbon reduction goals.

Cities striving for carbon neutrality recognize that averting the worst impacts of climate change will require cutting GHG emissions by at least 80% by 2050. Because urban areas account for nearly three-quarters of humanity's emissions, reaching this goal will depend in large part on our ability to reimagine and reinvent cities in ways that promote economic prosperity, social equity, enhanced quality of life, and climate resilience.

The Carbon Neutral Cities Alliance (CNCA or “Alliance”) aims to address what it will take for leading international cities to achieve these deep emissions reductions and how they can work together to meet their respective goals more efficiently and effectively.

Contact CNCA »



CNCA Innovation Fund Awards Its Second Round of Funding:

The CNCA Innovation Fund Selection Committee selected eight projects totaling $879,240 USD:

  • Capitalizing Carbon to Accelerate EV Charging Investments – Lead City: Portland
  • Thermal Break Shear Wall – Lead City: Portland
  • Bringing Renewable Thermal Solutions to Scale in New England – Lead City: Boston
  • How to Scale Corporate Renewable Electricity PPAs in Australia – Lead City: Melbourne
  • Food and Energy in a Circular Economy – Lead City: Stockholm
  • London Energiesprong Trial Project – Lead City: London
  • RealIZE: Bringing the clean industrial revolution to existing residential buildings – Lead City: San Francisco
  • Scandinavian Green Public Procurement Alliance – Lead City: Copenhagen

Congratulations to each of the awardees!  

More information about each of the above projects can be found here.


CNCA Framework for Long-Term Deep Carbon Reduction Planning

A core function of CNCA is to facilitate other cities’ understanding of how leading-edge cities are planning for long-term deep carbon reductions, and enable cities to take a more robust, consistent, equitable and comprehensive approach to carbon neutral planning and implementation. 

In 2015, we developed a streamlined Deep Carbon Reduction Planning Framework that provides a template for cities to use in developing their own plans, and identifies specific strategic challenges that cities continue to face in making further progress on carbon reduction. Based on the carbon neutrality plans developed by CNCA cities, the Planning Framework focuses exclusively on long-term and deep reductions, which require transformative rather than incremental approaches.

We also developed a companion Outline of the contents of a state-of-the-art "80x50" plan for reducing community wide greenhouse gas emissions by at least 80% by 2050 ("80x50").

Released December 2015

Read the framework »

Read the executive summary »

Download the Outline »


Infographic: How Much is Spent on Fossil Fuels in Cities 

CNCA has worked with five U.S. cities to create an infographic showing how much the citizens, businesses and municipal government spend on fossil fuels every year, where it goes and what it could otherwise fund if it were instead invested in the city's clean energy future.

Learn more »


Latest News

1 January 2017: CNCA 2016 Year in Review 

1 January 2017: CNCA Innovation Fund 2016 Annual Report

15 December 2016: CNCA Mayors Sign Joint Letter to U.S. Mayors

9 November 2016: CNCA Innovation Fund Awards Its Second Round of Funding

More news »


The Carbon Neutral Cities Alliance is supported by generous foundation grants from:



The Alliance is staffed by the Urban Sustainability Directors Network (USDN) 

in partnership with the Innovation Network for Communities (INC) and C40 Cities Climate Leadership Group (C40)