Well over 6,000 ships sunk during the Second World War sit on the bottom of oceans and seas worldwide. After roughly 70 years of exposure to the elements many are raising concerns that these distingrating wrecks could release the oil mostly still contained in their hulls. Though few of these ships contain anywhere near the oil released by the oil tanker seen sinking in this picture following a U-boat attack, when the oil from these thousands of ships is aggregated together it is estimated by some to total well in excess of the oil released by 2010's Deepwater Horizon spill.
