Does the North Sea contribute to the economy in any other way? 
 Thanks so much for that information! 
 Sure, the coast of the North Sea are home to nature reserves including Ythan Estuary, Fawlsheugh Nature preserve and Farne Island in the UK and the Wadden Sea National Park in Denmark, Germany and Netherlands. 
 Which country benefits most from that preservation? 
 Is that their biggest source of economical gain?
Sure, the coast of the North Sea are home to nature reserves including Ythan Estuary, Fawlsheugh Nature preserve and Farne Island in the UK and the Wadden Sea National Park in Denmark, Germany and Netherlands.