The Northern Isles (Scots: Northren Isles; Scottish Gaelic: Na h-Eileanan a Tuath; Old Norse: Norðreyjar; Norn: Nordøjar) are a pair of archipelagos off the north coast of mainland Scotland, comprising Orkney and Shetland. They are part of Scotland, as are the Hebrides. The climate is cool and temperate and much influenced by the surrounding seas. There are a total of 36 inhabited islands. The landscapes of the fertile agricultural islands of Orkney contrast with the more rugged Shetland islands to the north, where the economy is more dependent on fishing and on the oil wealth of the surrounding seas. Both island groups have a developing renewable energy industry. Both have a Pictish and Norse history. Both were part of the Kingdom of Norway until they were absorbed into the Kingdom of Sco