Which risk increased during the Song Dynasty when cast iron production relied heavily on coal-fired processes also vital for gunpowder manufacturing?

💡 Explanation

Deforestation pressures increased because simultaneous demands for fueling metallurgical furnaces and military gunpowder production increased coal consumption. Rampant coal usage resulted in deforestation, therefore prompting experimentation with coke rather than sulphur shortages. Coke substituted for wood, rather than nitrates as components.

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