25 Years of ICLEI
2015 marks our 25th anniversary. Watch the video to find out what we’ve achieved so far!
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Our most popular stories in 2025
To wrap up 2025, we look back at six stories that resonated most with our readers. From urban biodiversity and nature-based solutions to extreme heat, green finance and global sustainability agendas, these pieces capture a defining year for cities and regions.
From asphalt to wetland sponge park: How Chennai is absorbing water and building resilience
Once a parking lot and dumping ground, Chennai’s first wetland sponge park is leading the way for a climate-resilient city. Today, it functions as a natural water treatment system to manage stormwater and prevent floods, proving the power of nature-based solutions in shaping sustainable, thriving communities.
Mind the gap: How youth fall between presence and power in urban governance
This guest op-ed article argues that youth participation in urban governance must move beyond symbolism to real power, especially in the Global South.
Working with youth across the world: Cities powering inclusive climate action
Recognizing youth as powerful drivers of change, local and regional governments are creating meaningful spaces for their voices, leadership, and ideas. This International Youth Day, discover how ICLEI Members are actively involving young people in shaping inclusive and impactful climate action.
Circular Development Equitable Development ICLEI organization ICLEI's Five Pathways Japan Office Nature-based Development Resilient Development Zero emission Development
ICLEI Members in Japan are scaling action through ICLEI’s five pathways
In fiscal year 2024, ICLEI Members in Japan engaged in various activities connected to ICLEI’s five pathways toward sustainable urban…