Word: pigmentã
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...ugly traces of tape, shreds of paper, and endless staples piled upon Wigglesworth archway corkboards. What’s more, chalk is environmentally sound. It doesn’t require the reams of old-growth wood consumed by hundreds of redundant posters. Chalk—mere calcium carbonate and pigment??€”eventually washes away into the wastewater system harmless to the environment, whereas posters liberated by the wind clog drains and choke urban wastewater systems. In New York City, a subway safety study even found that stray posters and newspapers were a leading cause of track flooding...
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