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Emma Bailey, GuestNeon signs, some believe, hold the secret to the future of the earth.Inside that kitschy “We’re Open!” sign, a word made of molded glass gas-discharge tubes, is an ionized gas:plasma. Usually a combination of inert gases, the plasma is trapped inside a vacuum and sizzles at hundreds of degrees Celsius. Electricity “excites” the atoms, which lose their electrons and become an electrolyte. Later, when the atoms return to lower energy leve [...]
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