Sarnia vs Duluth

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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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Duluth (listen) də-LOOTH is a port city in the U.S. state of Minnesota and the county seat of St. Louis County. Duluth has a population of 85,618, making it Minnesota's fourth-largest city and the center of Minnesota's second largest metropolitan area, with a population of 278,799. Duluth forms a metropolitan area with neighboring Superior, Wisconsin; together they are called the Twin Ports. The city is named for Daniel Greysolon, Sieur du Lhut, the area's first known European explorer. Situated on the north shore of Lake Superior at the westernmost point of the Great Lakes, Duluth is the largest metropolitan area (and second-largest city) on the lake and is accessible to the Atlantic Ocean 2,300 miles (3,700 km) away via the Great Lakes Waterway and St. Lawrence Seaway. The Port of Duluth is the world's farthest inland port accessible to oceangoing ships, and by far the largest and busiest port on the Great Lakes.

The port is ranked among the top 20 ports in the United States by tonnage. Commodities shipped from the Port of Duluth include coal, iron ore, grain, limestone, cement, salt, wood pulp, steel coil, and wind turbine components. A tourist destination for the Midwest, Duluth features the United States' only all-freshwater aquarium, the Great Lakes Aquarium; the Aerial Lift Bridge, which is adjacent to Canal Park and spans the Duluth Ship Canal into the Duluth–Superior harbor; and Minnesota Point (known locally as Park Point), the world's longest freshwater baymouth bar, spanning 6 miles (10 km). The city is also the starting point for vehicle trips touring the North Shore of Lake Superior toward Ontario, Canada.

Source: Wikipedia