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CHINESE INVENTIONS Ancient Chinese Contributions Table of Contents ... smallpox inoculation, gunpowder, canals locks, The Great Wall of China, coal iron refining.
Copper: An Ancient Metal ... the Bronze and Iron Ages. ... and refining accounts for a significant portion of the greenhouse gas production and other air pollution ...
The change of fuel resources from charcoal to coal ... Iron from furnaces such as Lapphyttan was refined into wrought iron ... Iron and Steel in Ancient China ...
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Who discovered coal and who discovered that it could be used as a heat source and when? Coal was one of man''s earliest sources of heat and light.
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