Iron ore, the main raw material of steel, changed the lakes area and the nation.
VOA: special.2009.11.11
For 3, once nylon had been discovered and proven useful, the race was on, given the supply of cheap oil (the mainrawmaterial) post WWII, from the Arabian Gulf.
The main reason for Apple announcing a lower gross margin outlook for Q3 was the uncertainty behind the rawmaterial supply chain issues prevailing during the last few quarters due to the Japan tragedy.