Når der er knaphed på ressourcerne, er tvangen til innovation altid væsentligt større, end når man lever i overflod og ikke behøver at bekymre sig om, hvordan energien og andre ressourcer anvendes. ###>When resources were scarce the pressure to innovate was always considerably greater than when we could rely on having a plentiful supply and did not have to concern ourselves with how energy and other resources were used.