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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To wrap up 2024, we delve into the diverse array of stories that proved to be our most popular of the year – five stories that resonated, shaping and informing perspectives on sustainable urban development.
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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.