The Fortum oil refinery in Naantali near Turku, Finland viewed from the sea. Oil spills that have fouled shores of the island of Ruissalo in the city of Turku are found out to have come from the Fortum oil refinery in nearby Naantali, Finland, in December 2001. Greenpeace is invited by the city of Turku to analyse the origin of the oil and clean the polluted beaches.