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Title: Coal Conversion And Utilization R&D In Erda
Author: Raymond I. Zahradnik
Source: American Gas Association 1975
Year Published: 1975
Abstract: Marco Polo reported that the Chinese used black rocks for fuel, and recent studies indicate that the Chinese may have used coal in small amounts for two or three millennia previously. The use of coal as a major source of energy however, did not begin until about the twelfth century, when the inhabitants of the northeast coast of England discovered that certain black rocks found along the seashore-and thereafter known as sea coles would burn.

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