Ships release about 1.25 million metric tons (1.4 million tons) of oil each year, and cruise ships alone release as much as 30,000 gallons (100,000 liters) of sewage every day.
Jedes Jahr lassen Schiffe ungefähr 1,25 Millionen Tonnen Öl ins Wasser ab - durch Kreuzfahrtschiffe allein gelangen täglich bis zu 100.000 Liter Abwasser in die See.