sentences:  Norway is one of the leading countries in the electrification of its transport sector, with the largest fleet of electric vehicles per capita in the world (see plug-in electric vehicles in Norway and electric car use by country).Since the discovery of North Sea oil in Norwegian waters during the late 1960s, exports of oil and gas have become very important elements of the economy of Norway.With North Sea oil production having peaked, disagreements over exploration for oil in the Barents Sea, the prospect of exploration in the Arctic, as well as growing international concern over global warming, energy in Norway is currently receiving close attention.