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发表于2024-11-13
Salt pdf epub mobi txt 电子书 下载 2024
Salt is so important that it has been used as money and has supported the economies of many countries over the centuries. This book takes a fascinating look at- the composition of salt and how the body uses it- Ghandi's defiance of Britain's salt laws and salt's use by the first explorers- huge salt deposits in the Gulf of Mexico and salt glaciers in Iran- salt production, its different grades, and uses- rock salt mining, solution mining and brine evaporation, and solar salt production- pollution problems and alternatives to salt useChildren will be intrigued by this series that digs deep. Raw materials found under the earth have both a practical purpose, providing us with fuel, and a pleasing purpose, giving us dazzling jewels and metals to adorn ourselves. This fascinating series uses clear text, amazing photographs, and detailed diagrams to explain- how the material is formed- its use throughout history- where it is found in the world- how it is located and extracted- who is involved in its extraction- how the material is used- the potential problems for the environment and our health
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Salt pdf epub mobi txt 电子书 下载 2024