Shipwrecks off America’s coasts are more often historical artefacts than present-day threats from leaking old oil tanks
a Government report says. While 87 of the ships most sunk during World War II have the potential to leak tens of millions of litres of oil, the report says ‘the scope of the problem is much more manageable than initially feared’. There are about 20,000 shipwrecked vessels off the United States coast. Most finished leaking long ago, ran on coal instead of oil, are too small or are not near vulnerable land.