Blue roof
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A blue roof is a roof of a building that is designed explicitly to provide initial temporary water storage and then gradual release of stored water, typically rainfall. Blue roofs are constructed on f
Pollution caused by combined sewer system overflows
Egyptian blue
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Egyptian blue, also known as calcium copper silicate, calcium copper tetrasilicate, or cuprorivaite, is a pigment with the chemical formula CaCuSi4O10 that was used in ancient Egypt for thousands of y
Blue roof
…roof" has been proposed by researchers at the Lawrence Berkeley National Laboratory, who researched a pigment used by the ancient Egyptians known as "Egyptian blue". This color, derived from calcium copper silicate, absorbs visible light, and emits light in the near-infrared range, helping keep roofs and walls…
Egyptian blue
Pyxis made out of "Egyptian blue" faience: Imported to Italy from northern Syria, it was produced 750–700 BC. (Shown at Altes Museum in Berlin)
Blue faience saucer and stand, New Kingdom (1400–1325 BC)