Foie gras
In 2016, it was reported that France produces an estimated 75% of the world's foie gras and southwestern France produces approximately 70% of that total. In 2016, it can retail for upwards of $65 a pound.
Fonterra
Fonterra is New Zealand's largest producer of biofuel, processing a waste stream from casein manufacture into bio-ethanol. The company produces around 20 million litres of premium ethanol annually. 
Since 2004, Fonterra has produced ethanol from whey, a by-product of casein, in the Edgecumbe, Tirau and Reporoa plants. That year Fonterra's Edgecumbe plant showcased the power of its biogas, operating a 1.8 litre Hyundai vehicle on a petrol mixture containing 10 percent ethanol. In 2008, Fonterra began supplying Gull Petroleum with ethanol from its Edgecumbe plant.