https://carbonneutralcities.org/
From the website:
“The Carbon Neutral Cities Alliance (CNCA) is a collaboration of leading global cities achieving carbon neutrality before 2050 — the most aggressive GHG reduction targets undertaken anywhere by any city.
“It is possible for cities to achieve their interim carbon reduction targets through incremental improvements to existing systems, but achieving carbon neutrality will require radical, transformative changes to core city systems.
“The 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.
“These cities collaborate to share lessons in planning for and implementing deep carbon reductions and opportunities to accelerate best practices in deep decarbonization. This is how we do it:
“Developing Carbon Neutral Planning and Implementation Standards
“Supporting Deep Decarbonization Innovations
“Advancing Transformative Change in Key Urban Areas
“Speaking with a Common Voice
“Advancing a “Next Wave” of Carbon Neutral Cities”