Wohlers explained 3D - printed items cost an average of $ 4 a cubic inch, which means it's only cost effective to 3D print commodities that are produced in low volumes with high markups — such as airplane parts or hip replacements.
They determined the amount of water transferred in kilograms by multiplying the traded volume of a specific food item by the water used to produce a unit of this item (the item's «virtual water content») in the exporting province.
This too emphasizes the fact that optimal health depends upon a diet with the majority of volume and calories coming from items growing on a plant, not produced in a plant.