In order to manufacture one must mine and refine the raw materials. To mine and refine one must be able to find the raw materials. To manufacture one must know how things work and be able to design and build. It goes on-and-on endless overwhelm of technology that we have today in the long drawn out text and reference books we have today. The trick to this is "the evaluation of importance" and finding "the essential information", not the overwhelm of the total of what is available today.
Offered by Mike.
Mining for some raw materials could be quite easy in some locations as volcanic activity brings new materials to the surface.
Offered by Steve