The Norwegian surface area covers 385,230 km2, and the total sea area within the economic zone and the fisheries protection zones around Svalbard and Jan Mayen total 1,878,961 km2. With 4.9 million inhabitants, Norway has the lowest population density in Western Europe, with approximately 12 inhabitants per km2. A rough climate, poor soil and difficult terrain mean that a large part of the country is marginal or unsuitable for settlements or agriculture.