Sarnia vs Ketchikan

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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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Ketchikan ( KETCH-ih-kan; Tlingit: Kichx̱áan) is a city in and the borough seat of the Ketchikan Gateway Borough of Alaska. It is the state's southeasternmost major settlement. Downtown Ketchikan is a National Historic District. With a population at the 2010 census of 8,050, it is the fifth-most populous city in the state, and tenth-most populous community when census-designated places are included. The surrounding borough, encompassing suburbs both north and south of the city along the Tongass Highway (most of which are commonly regarded as a part of Ketchikan, albeit not a part of the city itself), plus small rural settlements accessible mostly by water, registered a population of 13,477 in that same census. Estimates put the 2017 population at 13,754 people.

Incorporated on August 25, 1900, Ketchikan is the earliest extant incorporated city in Alaska, because consolidation or unification elsewhere in Alaska resulted in dissolution of those communities' city governments. Ketchikan is located on Revillagigedo Island, so named in 1793 by Captain George Vancouver. Ketchikan is named after Ketchikan Creek, which flows through the town, emptying into the Tongass Narrows a short distance southeast of its downtown. "Ketchikan" comes from the Tlingit name for the creek, Kitschk-hin, the meaning of which is unclear. It may mean "the river belonging to Kitschk"; other accounts claim it means "Thundering Wings of an Eagle". In modern Tlingit, this name is Kichx̱áan.

Source: Wikipedia