Foie gras
In the 21st century, France is by far the largest producer and consumer of foie gras, though it is produced and consumed in several other countries worldwide, particularly in some other European nations, the United States, and China. Approximately 30,000 people are members of the French foie gras industry, with 90% of them residing in the Périgord (Dordogne), the Aquitaine régions in the southwest, and Alsace région in the east. The European Union recognizes the foie gras produced according to traditional farming methods ("label rouge") in southwestern France with a geographical indication of provenance.
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.