Sarnia vs Dunedin

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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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Dunedin ( (listen) duh-NEE-din; Māori: Ōtepoti) is the second-largest city in the South Island of New Zealand (after Christchurch), and the principal city of the Otago region. Its name comes from Dùn Èideann, the Scottish Gaelic name for Edinburgh, the capital of Scotland.The urban area of Dunedin lies on the central-eastern coast of Otago, surrounding the head of Otago Harbour, and the harbour and hills around Dunedin are the remnants of an extinct volcano. The city suburbs extend out into the surrounding valleys and hills, onto the isthmus of the Otago Peninsula, and along the shores of the Otago Harbour and the Pacific Ocean. Dunedin was the largest New Zealand city by territorial land area until superseded by Auckland with the formation of the Auckland Council in November 2010. Archaeological evidence points to lengthy occupation of the area by Māori prior to the arrival of Europeans. The province and region of Otago takes its name from the Ngāi Tahu village of Otakou at the mouth of the harbour, which became a whaling station in the 1830s. In 1848 a Scottish settlement was established by the Lay Association of the Free Church of Scotland. Between 1855 and 1900 many thousands of Scots emigrated to the incorporated city.

Dunedin became wealthy during the Central Otago Gold Rush, beginning in the 1860s. In the mid-1860s, and between 1878 and 1881, it was New Zealand's largest urban area. The city population at 5 March 2013 was 120,246. While Hamilton, Tauranga and Lower Hutt have eclipsed the city in size of population since the 1980s to make it only the seventh-largest urban area in New Zealand, Dunedin is still considered one of the four main cities of New Zealand for historic, cultural and geographic reasons.Dunedin has a diverse economy, which includes manufacturing, publishing and technology-based industries as well as education, research and tourism. The city's most important activity centres around tertiary education—Dunedin is home to the University of Otago, New Zealand's oldest university (established 1869), and the Otago Polytechnic. Students account for a large proportion of the population; 21.6 per cent of the city's population was aged between 15 and 24 at the 2006 census, compared to the New Zealand average of 14.2 per cent. In 2014 Dunedin was designated as a UNESCO City of Literature.

Source: Wikipedia