Sarnia vs Carlisle

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Sarnia is a city in Southwestern Ontario, Canada, with a 2016 population of 71,594. It is the largest city on Lake Huron and in Lambton County. Sarnia is located on the eastern bank of the junction between the Upper and Lower Great Lakes where Lake Huron flows into the St. Clair River, which forms the Canada–United States border, directly across from Port Huron, Michigan. The site's natural harbour first attracted the French explorer La Salle. He named the site "The Rapids" on 23 August 1679, when he had horses and men pull his 45-ton barque Le Griffon north against the nearly four-knot current of the St. Clair River.This was the first time that a vessel other than a canoe or other oar-powered vessel had sailed into Lake Huron, and La Salle's voyage was germinal in the development of commercial shipping on the Great Lakes. Located in the natural harbour, the Sarnia port remains an important centre for lake freighters and oceangoing ships carrying cargoes of grain and petroleum products. The natural port and the salt caverns that exist in the surrounding areas, together with the oil discovered in nearby Oil Springs in 1858, led to the dramatic growth of the petroleum industry in this area.

Because Oil Springs was the first place in Canada and North America to drill commercially for oil, the knowledge that was acquired there resulted in oil drillers from Sarnia travelling the world teaching other enterprises and nations how to drill for oil.The complex of refining and chemical companies is called Chemical Valley and located south of downtown Sarnia. In 2011 the city had the highest level of particulates air pollution of any Canadian city, but it has since dropped to rank 30th in this hazard. About 60 percent of the particulate matter comes from industries and polluters in the neighbouring United States.Lake Huron is cooler than the air in summer and warmer than the air in winter; therefore, it moderates Sarnia's humid continental climate, making temperature extremes of hot and cold less evident. In the winter, Sarnia occasionally experiences lake-effect snow from Arctic air blowing across the warmer waters of Lake Huron and condensing to form snow squalls over land.

Source: Wikipedia

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Carlisle ( kar-LYLE, locally KAR-lyle; from Cumbric: Caer Luel; Scottish Gaelic: Cathair Luail) is a border city and the county town of Cumbria as well as the administrative centre of the City of Carlisle district in North West England. Carlisle is located at the confluence of the rivers Eden, Caldew and Petteril, 10 miles (16 km) south of the Scottish border. Originally in the historic county of Cumberland, it is now the largest settlement in the county of Cumbria, and serves as the administrative centre for both Carlisle City Council and Cumbria County Council. At the time of the 2001 census, the population of Carlisle was 71,773, with 100,734 living in the wider city. Ten years later, at the 2011 census, the city's population had risen to 75,306, with 107,524 in the wider city.The early history of Carlisle is marked by its status as a Roman settlement, established to serve the forts on Hadrian's Wall. During the Middle Ages, because of its proximity to the Kingdom of Scotland, Carlisle became an important military stronghold; Carlisle Castle, still relatively intact, was built in 1092 by William Rufus, and once served as a prison for Mary, Queen of Scots in 1568.

The castle now houses the Duke of Lancaster's Regiment and the Border Regiment Museum. In the early 12th century, Henry I allowed the foundation of a priory in Carlisle. The town gained the status of a city when its diocese was formed in 1133, and the priory became Carlisle Cathedral. The introduction of textile manufacture during the Industrial Revolution began a process of socioeconomic transformation in Carlisle, which developed into a densely populated mill town. This, combined with its strategic position, allowed for the development of Carlisle as an important railway town, with seven railway companies sharing Carlisle railway station. Nicknamed the Great Border City, Carlisle today is the main cultural, commercial and industrial centre for north Cumbria. It is home to the main campuses of the University of Cumbria and a variety of museums and heritage centres. The former County Borough of Carlisle had held city status until the Local Government Act 1972 came into force in 1974.

Source: Wikipedia