Did you know that Guildford is twinned with “possibly the greenest city in the world” ??

Solarsiedlung_von_obenWell I didn’t. But it is, and the town is called Freiburg.

The houses pictured to the left, for example, generate twice as much energy as the average house in Germany consumes during a year.

Super-insulated ‘passiv houses’ maintain an indoor temperature of 24 degrees while outside the temperature is below 10. But the radiators are all turned off — warmth is provided by cooking, lighting, even warm-blooded mammals.

You can read more here and here.

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