| http://www.w3.org/ns/prov#value | - udy by Oceana (quoted by El Pa??s), sailing in the Mediterranean up to 10 grams of hydrocarbons per liter.Although small, the Mediterranean is a sea but a popular one-third of world merchant shipping passing through it, and about 20% of the oil traffic, on average each year 12 thousand vessels ply these waters.
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