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Coal, Iron and Steam

Horizontales
Due to ____ coal could reach better markets and expand.
Main use for iron..
Silver metal.
And nearly how much by the 1800s. (2 words)
Who was the first man to smelt iron?
Name for processed coal.
Verticales
From 1700-1750 production increased by how much? (2 words)
What does coal make when its used in trains?
As the revolution developed so did the ____. (2 words)
Main use for coal.
Black or brown rock