If record-high food prices weren’t enough. The Russia-Ukraine conflict has choked off the world of sunflower oil supply, forcing the largest supermarket in the UK to begin rationing. The Guardian reports that Tesco, with more than 4,000 retail stores, placed buying limits of three cooking oil bottles per customer. It follows Waitrose and Morrisons, other supermarket chains that set limits of just two per customer. The UK’s biggest retailer is experiencing sourcing issues with cooking oil, especially sunflower oil, which much of it comes from Ukraine. As retailers panic about sourcing edible oils, it has driven retail cooking oil prices...