District energy systems, a more sustainable way of heating and cooling buildings, have been around for more than 120 years, however, they are only now getting their day in the sun. From Paris and Copenhagen to Singapore and Dubai, more cities are deploying the tried-and-tested technology to reduce their energy use and carbon emissions.

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This article was published in the APUEA Magazine No.1/2018. See the full magazine on www.apuea.org