Iron Mines in Michigan - NASA
But by the 1950s, most of the easily accessible ore with high concentrations of iron was gone, and mining companies had to dig much deeper and develop new techniques to extract and concentrate iron from lower-grade ore.How can metal mining impact the environment? | American,,Material adapted from: Hudson, T.L, Fox, F.D., and Plumlee, G.S. 1999. Metal Mining and the Environment, p. 7,20-27,31-35,38-39. Published by the American Geosciences Institute Environmental Awareness Series. Modern mining operations actively strive to mitigate potential environmental consequences of extracting metals, and such operations are strictly regulated in the UnitedIron in the Industrial Revolution - ThoughtCo,Jul 26, 2019· 1825 has been called the start of the new Iron Age, as the iron industry experienced a massive stimulation from the heavy demand for railways, which needed iron rails, iron in the stock, bridges, tunnels and more. Meanwhile, civilian use increased, as everything which could be made of iron began to be in demand, even window frames.