Sarnia vs Medicine Hat

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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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Medicine Hat is a city in southeast Alberta, Canada. It is located along the South Saskatchewan River. It is approximately 169 km (105 mi) east of Lethbridge and 295 km (183 mi) southeast of Calgary. This city and the adjacent Town of Redcliff to the northwest are within Cypress County. Medicine Hat was the sixth-largest city in Alberta in 2016 with a population of 63,230. Started as a railway town, today Medicine Hat is served by the Trans-Canada Highway (Highway 1) and the eastern terminus of the Crowsnest Highway (Highway 3). Nearby communities considered part of the Medicine Hat area include the Town of Redcliff (abutting the city's northwest boundary) and the hamlets of Desert Blume, Dunmore, Irvine, Seven Persons, and Veinerville.

The Cypress Hills (including Cypress Hills Interprovincial Park) is a relatively short distance (by car) to the southeast of the city. Historically, Medicine Hat has been known for its large natural gas fields, being immortalized by Rudyard Kipling as having "all hell for a basement". Because of these reserves, the city is known as "The Gas City".

Source: Wikipedia