As with many other foods and beverages, an increasing number of so-called organic wines are now hitting the market. Organic wines are fermented from grapes grown without the use of chemical fertilizers, pesticides, or herbicides. However, like all wine, organic wines still contain sulfites, since a small amount of sulfites are produced naturally during the fermentation process. The rules and methods for producing organic grapes and wine depend on the country of origin and the certification body involved. Biodynamic grape growing and winemaking (called biodynamie in France) is another school of the organic thought: it involves many of the standard organic practices, but also includes homeopathic applications in the vineyard for pest and disease control. Nicolas Joly of Loire Valley is a leading proponent of biodynamic wines.