SPAIN Near O Grove -- 15/12/2002 -- Aerial view of a polluted beach near O Grove on the Galician coast. Thousands of volunteers and military personnel are involved in the clean-up operation which could last for six months (pictured as white dots on the beach, oil is black rocks and stains on sand). Thousands of tonnes of heavy fuel oil has contaminated large swathes of the north-western coast of Spain after the tanker Prestige sank in late November 2002. The ship was carrying around 77,000 tonnes of heavy fuel oil and a lot of the oil has leaked into the sea causing a ecological disaster along much of the southern Atlantic coast of Europe. The cost of the disaster is estimated at over 20 billion Euros.