Intersecting production chains. This could be the key element of the circular economy where the stark difference between twentieth and twenty-first centuries could be noticed, as far as the use of resources in the production processes is concerned. Indeed, over the whole of last century, the production processes were backed up by discoveries of new materials. In 1953, Nobel-prize laureate Giulio Natta developed, together with Karl Ziegler, a series of catalysts to produce isotactic polymers, which opened the way to new and shocking perspectives in the field of plastics and in 1954, in Russia the first power plant using nuclear matter started to function and such examples could be endless. Such discoveries on raw materials and energy led most of twentieth century product...