How did new methods of producing iron and steel increase industrialization?

The use of iron and steel is very much common in most of the infrastructure being built today. The new methods developed for the production of these essential metals have helped hasten and loosen the supply for the demand. By that, buildings have sufficient supply of these metals. 

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question - in the 1900s there were two competing views about the environment that often pitted industrialist and conservationist against one another. how were these two competing views demonstrated by the environmental policies of president roosevelt and president taft?

theodore had a quicked tempered personality while president taft was shy and barely noticable.theodore had started a dealing service with big companies which president taft completed.both were into making sure workers were always safe.president taft took the presidency more serious than theodore did.both loved to save nature.

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