> Around the 1930s and 1940s, Arthur Imhausen developed and implemented an industrial process in Germany for producing edible fats by oxidizing synthetic paraffin wax made from coal.[18] The products were fractionally distilled and the edible fats were obtained from the C
9-C
16 fraction[19] which were reacted with glycerol such as that synthesized from propylene.[20] Margarine made from them was found to be nutritious and of agreeable taste, and it was incorporated into diets contributing as much as 700 calories per day.[21][22] The process required at least 60 kg of coal per kg of synthetic butter.[20] That industrial process was discontinued after WWII due to its inefficiency.

Wtf