Mike Phillips.

How to make sunflower oil: Grow sunflowers on industrial monoculture arable land using nitrogen fertiliser derived from the Haber-Bosch process, pesticides, fungicides, and irrigation. Harvest. Transport to facility. Apply hexane, a petroleum-derived solvent, to extract the oil from the seed mass. Heat the mixture to evaporate the hexane. Some hexane remains. This is classified as acceptable residual levels. The resulting oil is dark and foul-smelling. Refine it under high heat and pressure. Bleach it. Deodorise it at temperatures around 240 degrees Celsius. Test for colour and odour. Bottle. Label "heart healthy." Ship. How to make butter, via Doris: Doris grazes. Doris is milked. The milk is cream. The cream is churned. That's it. The churning takes no solvents. The churning does not require a petroleum derivative. The churning does not produce a residue that needs to be classified as acceptable. The churning is just churning, which humans have been doing for ten thousand years without needing a refinery. The butter contains vitamins A, D, E and K2. It is stable at cooking temperatures. It tastes, by any available metric, magnificent. Doris is not available for comment. She is in Brian's field again.