Reletter
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A newsletter covering the C40 Centre's latest thought pieces, updates on our peer-reviewed journal and the Cities 1.5 podcast.

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Substack
PricingOnly free issuesPublishesWeekly
Issues69Founded4 years agoLast Issue21 days ago
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Latest Issues

Sustainable prosperity in the 21st century city & more from our Journal

I am pleased to share the Special Issue on Special Issue on Sustainable Prosperity in the 21st-Century City as well as the latest, open-call issue of the Journal of City Climate Policy and Economy.

The Journal of City Climate Policy and Ec...

21 days ago
6

Cities and the data centres investment boom

History warns us against allowing private sector interests to dictate the layout and pace of the development of critical networks, especially during an investment boom or hype cycle. Data centres are currently experiencing such a boom globa...

2 months ago
8

Cities Don't Need Permission to Protect Public Health

On February 12, 2026, the US Environmental Protection Agency (EPA) finalized the revocation of its own 2009 Endangerment Finding: the scientific and legal foundation, upheld across four subsequent administrations, that greenhouse gas emissi...

3 months ago
1

End of the month, end of the world—same struggle

From the privileged safety of our desks, we are seeing one year’s worth of news and international crises take place in January 2026 alone. Yet, when we came across this chart from Axios showing the US’ most popular google searches last year...

4 months ago
2

It’s Grand Ol’Bargain

Just over two weeks ago, our PM Mark Carney - a climate advocate in the past - announced that he supported a new pipeline to allow for the massive expansion of the Alberta oil sands. In addition to being disastrous from a climate perspectiv...

5 months ago
1

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Authors

The writers behind this newsletter.

  • David Miller
  • Francesco Mellino

    Senior Ecological and Wellbeing Economist at C40 Cities.

  • Chiara Morfeo

    Senior Manager for Research and Communications at the C40 Centre for City Climate Policy and Economy. Prior to joining C40, Chiara worked in communications at University College London and the UNECE.

  • Quinn Adams

    Scholar in Residence for climate and health at the C40 Centre for City Climate Policy and Economy. Quinn holds a PhD in Environmental Epidemiology from Boston University and is a postdoctoral research associate with CIRES.

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