More than 190 nations agreed Friday on a new treaty to combat so-called biopiracy and regulate patents stemming from genetic resources such as medicinal plants, particularly ones whose uses owe a debt to traditional knowledge. More than 190 nations agreed Friday on a new treaty to combat so-called biopiracy and regulate patents stemming from genetic resources such as medicinal plants, particularly ones whose uses owe a debt to traditional knowledge. Other Phys.org – latest science and technology news stories