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Trains in Switzerland Are Now Running Over Solar Panels in a First-of-Its-Kind Test
(www.zmescience.com)
Everything about energy production and storage.
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Every parking lot needs approval of the location, its probably a a pain in the ass, and would disrupt parking while being built which impacts sales (or will be perceived to anyway). If this worked, you only need to deal with a small group of people for a very large space.
Meanwhile...it's mandatory in France for any newly built parking lot over a certain size.