Cities worldwide are cutting emissions, greening streets, and adapting to climate threats faster than national governments, according to a new international report.
In short:
- A report from the Global Covenant of Mayors and C40 shows 75% of major cities in the network are reducing per capita emissions more quickly than their national governments, with an average drop of 7.5% from 2015 to 2024.
- Urban leaders are responding directly to rising local impacts of climate change — heat, flooding, and sea-level rise — by planting trees, electrifying transit, and improving walkability and energy efficiency.
- Despite growing efforts, cities face major funding gaps: The report estimates they need $4.5 trillion annually by 2030 to meet climate goals, far above the current $179 billion invested in 2024.
Key quote:
“I think they’re going above and beyond in some respects, about planning for the future, as well as actually implementing some of the things that the federal governments have signed on to.”
— Dan Jasper, senior policy advisor at the climate solutions group Project Drawdown
Why this matters:
Urban areas house over half the world’s population. Their concrete-heavy landscapes absorb and retain heat, turning heatwaves deadly. Aging sewer systems buckle under increasingly intense storms, while sea-level rise threatens coastal infrastructure. As cities expand, these risks grow. Yet cities are also nimble: Mayors can act faster than national leaders and often enjoy more public support for visible improvements. But without enough funding, even the most ambitious cities will struggle to protect their people from what’s coming.
Related: Mayors lead climate fight with practical solutions as federal support wanes
