Startup Idea : Human Fat for Fuel

Pains: (a) many people do not like that we drill for oil (b) many more have issues with keeping their body fat to healthy levels in this age of abundance Solution: Find ways to extract human fat cheaply (many people would pay you to remove their fat!) and utilize it profitably--eg diesel fuel, aviation fuel, wax, lubrication, soldering flux (1) (2). People could go to little trucks like the blood bank trucks to get their fat removed. Sounds absurd, but can something be done here? :) References: (1) https://www.sciencedirect.com/science/article/pii/S0378382011002116 (2) https://en.wikipedia.org/wiki/Tallow