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Coal | fossil fuel | Britannica.com

Coal: Coal, solid, usually brown or black, carbon-rich material that most often occurs in stratified sedimentary deposits. It is one of the most important of the primary fossil fuels.

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Encyclopedia Judaica: Metals & Mining - Jewish Virtual Library

Encyclopedia of Jewish and Israeli history, politics and culture, with biographies, statistics, articles and documents on topics from anti-Semitism to Zionism.

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