Last updated: March 12, 2016
- November 2015: Holger Sauer demonstrated in the town of Kocherinovo, Bulgaria, at 10 degrees on 23 November that solar cookers can be used year-round - 700 g potatoes were cooked in 1 liter of water in 25 minutes.
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- Voyez cet article dans le wiki en français: Bulgarie