Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Hudson County, New Jersey population was enumerated at 634,266, in turn an increase of 25,291 (+4.2%) from the 608,975 enumerated in the 2000 Census. Hudson County is the fourth-most populous county in the state. Hudson County is the geographically smallest and most densely populated county in New Jersey and the sixth-most densely populated county in the United States, with 13,731.4 residents per square mile of total area in 2010, and 14,973.9 per square mile in 2017. <mapframe latitude="40.7367" longitude="-74.0660" zoom="11" width="300" height="400" align="right" text="Interactive map of municipalities of Hudson County."> SELECT ?id ?idLabel (CONCAT('', ?idLabel, '') AS ?title) ?OSM_relation_ID WHERE { " </mapframe> There