In 1996 they expanded to take on river issues, particularly the Rio Grande silvery minnow, which was brought to the brink of extinction when drought caused the Rio Grande to dry up for 60 miles.
Rio de Janeiro | Rio Grande do Sul | Rio Grande | Rio de Janeiro (state) | Grande Comore | Rio Grande do Norte | Río de la Plata | Rio | Rio Tinto Group | Rio Negro | Natal, Rio Grande do Norte | Rio Tinto | Rio Negro (Amazon) | Rio Grande Valley | Pinar del Río | Río Piedras, Puerto Rico | Rio Branco | Pinar del Río Province | Ribeira Grande, Cape Verde | Rio Ferdinand | Ribeira Grande | Universidade Federal do Rio Grande do Sul | Río Negro | Grande Chartreuse | Del Rio, Texas | Campo Grande | Rio Tinto Alcan | Río Piedras | Río Negro Province | Río Cuarto, Córdoba |