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Sweden is testing a semi-truck trailer covered in 100 square meters of solar panels
(www.popsci.com)
This is a most excellent place for technology news and articles.
Because the people who greenlight these projects are usually just idiots in charge of things. This will waste a bunch of money but will give the appearance of trying to do something. They'll make a bunch of money, and they look good doing it. When it fails they will pass the blame to someone else.