The New Zealand Herald's extended report on the hair extension industry and how hair gets from rural China to first world salons
Le Figaro has a great article with photographs of the journey of human hair obtained as offerings to the gods by pilgrims in Tirupati to the beauty salons of New York and the heads of such as Lady Gaga and Beyonce. Since its in French, here's Mother Jones covering the same in English. A Spaniard in London does a photo essay while exporters show you a flowchart of the entire process. Highly valued and in short supply, remy hair, as it is known, is very different from the stuff you find being used in pesticides, pizza base and deer repellent (warning: Fox News link).