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Although it is not a precious metal, copper is often mentioned alongside gold and silver. It has high thermal conductivity, high electrical conductivity, and is easy to process. It has excellent properties, and as one of the oldest metals that humans began using, it is one of the metals that supports our lives. We will explain the history of copper, recycling, the evolution of copper alloys, and more. We will explain the past and future of copper. ◆ Reference materials "Manga" Yamaguchi Ikuko, "Composition" YHB Editorial Department Planning, "Publisher" Murata Tsuyoshi, "Editor" Kimoto Seiichi (2020) "Gakken Manga Easy to Understand Series 168 The Secret of Copper" Gakken Plus Co., Ltd. Watanabe Katsuaki (2022) "Thinking about this and that around us from a geological perspective" Bere Publishing Matsubara Satoshi, Izumi Kentaro, Kurozumi Taiji (2019) "World Minerals, Rocks, Fossils, and Shells Encyclopedia" (Studio Tac Creative Co., Ltd.) Murakami Takashi (2007) "The History of Gold, Silver, and Copper in Japan" Iwanami Shoten Nakae Hideo (2018) "Castings" Hosei University Press Eric Chaline (2013) "Illustrated Guide to 50 Minerals that Changed World History" Hara Shobo World Heritage Certification Office (2020) "Everything You Need to Know World Heritage Encyclopedia Vol. 2" 2nd Edition" Mynavi Publishing Co., Ltd. Matsubara Satoshi (2022) "Newton Mineral Encyclopedia" Newton Press Co., Ltd. #Slow commentary #Slow history commentary #History of copper #Complete history of things