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Synthetic materials are made from natural resources. Synthetic materials are made bychemically changing the starting substances to create a material with different

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Gold was one of the first precious metals mined because it commonly appears in the groundin its natural form. Ancient civilizations such as the ancient Egyptians

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Outbreak of Fatal Childhood Lead Poisoning Related to Artisanal Gold Mining inNorthwestern Nigeria, 2010

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Outbreak of Fatal Childhood Lead Poisoning Related to Artisanal Gold Mining inNorthwestern Nigeria, 2010

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What are tailings? The waste from the mining industry

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CHEMISTRY . content . From air to molecule . Air composition . Dioxygen, forming air withnitrous. The oxygen necessary for life. Volume and mass of air.

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opium use by chinese americans in nineteenth century led to severe repression by whites

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Mining engineering is an engineering discipline that applies science and technology tothe extraction of minerals from the earth. Mining engineering is associated

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Mining - Wikipedia

Mining is the extraction of valuable minerals or other geological materials from theearth usually from an orebody, lode, vein, seam, reef or placer deposits.

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Toward a New U.S. Chemicals Policy: Rebuilding the Foundation to Advance New Science,Green Chemistry, and Environmental Health