https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8799504
Lack of Rain Turned Into a Message on an Outdoor Advertising Sign, Asking People to Conserve Their Energy Output During the Fuel Crisis in Late 1973 in the Pacific Northwest 12/1973. Photographer: Falconer, David. Original public domain image from Flickr
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