Fish poisoned by cyanide lined the bank of Tisa River in Yugoslavia in 2000 after a Romanian gold mine's dam overflowed. The polluted water poured into the Lapus and Samos rivers before running west into Hungary. (Associated Press)

Fish poisoned by cyanide lined the bank of Tisa River in Yugoslavia in 2000 after a Romanian gold mine's dam overflowed. The polluted water poured into the Lapus and Samos rivers before running west into Hungary. (Associated Press)