Genearal - record for time, energy, and optimization of workflow on GVCS and related projects

Specific - Energy of Production

14-17 kWhr are used for producing 1 kg of PLA plastic 3D printing filament! See excellent industrial ecology paper, p. S84 at [1]
Note that this is the same amount of energy as that required to smelt 1 kg of aluminum from aluminum oxide!

Embodied Energy