(Thanks to NoCamels) Israeli designer Nir Meiri’s Marine Light project uses seaweed to make lampshades. He writes that seaweed is harvested on a commercial scale, “as a result of a growing interest driven by environmental concerns.” Meiri presented his creation at Milan Design Week.
http://nocamels.com/2013/05/israeli-designer-uses-seaweed-to-create-cool-lamps/