Youth cool off in a fountain in downtown Berlin, as a heatwave hits, Germany, July 2, 2025.
Youth cool off in a fountain in downtown Berlin, as a heatwave hits, Germany, July 2, 2025.(Lisi Niesner/Reuters)

Here’s another dispatch from the AC wars, this time from the Flemish philosopher, Maarten Boudry.

It’s all worth reading, but here are some extracts, starting with this:

The economist Alan Barreca has shown that the risk of death on extremely hot days in the United States fell by roughly 75 percent over the twentieth century — a decline that happened in lockstep with the mass adoption of air conditioning after 1960. In his words: “the adoption of residential air conditioning explains essentially the entire decline in the temperature-mortality relationship.”

Part of the reason for the unwillingness of Europeans (or their governments) to embrace AC ...

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