Before revision: The WWF's list featured the Danube, the Nile, and the Rio Grande amongst others, stating that these "once great rivers" are in danger and "can no longer be assured of reaching the sea unhindered".
After revision: 2007The WWF's list featured the Danube, the Nile, and the Rio Grande amongst others, stating that these "once great rivers" are in danger and "can no longer be assured of reaching the sea unhindered".