ahlam1399
04-05-2016, 12:54 PM
Engineers warn the deadly Samarco mine disaster in Brazil in **vember shows the world-wide risk from Hoover Dam-size earthen structures holding ?tailings? waste.
أكثر... (http://www.wsj.com/articles/brazils-samarco-disaster-mining-dams-grow-to-colossal-heights-and-so-do-the-risks-1459782411?mod=fox_australian)
أكثر... (http://www.wsj.com/articles/brazils-samarco-disaster-mining-dams-grow-to-colossal-heights-and-so-do-the-risks-1459782411?mod=fox_australian)