Sarnia vs Oldham

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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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Oldham is a large town in Greater Manchester, England, amid the Pennines and between the rivers Irk and Medlock, 5.3 miles (8.5 km) southeast of Rochdale and 6.9 miles (11.1 km) northeast of Manchester. It is the administrative centre of the Metropolitan Borough of Oldham, which had a population of 230,800 in 2015. Historically in Lancashire, and with little early history to speak of, Oldham rose to prominence in the 19th century as an international centre of textile manufacture. It was a boomtown of the Industrial Revolution, and among the first ever industrialised towns, rapidly becoming "one of the most important centres of cotton and textile industries in England". At its zenith, it was the most productive cotton spinning mill town in the world, producing more cotton than France and Germany combined.

Oldham's textile industry fell into decline in the mid-20th century; the town's last mill closed in 1998. The demise of textile processing in Oldham depressed and heavily affected the local economy. Today Oldham is a predominantly residential town, and the improvement of the town centre is the focus of a project for transforming Oldham into a centre for further education and the performing arts. It is, however, still distinguished architecturally by the surviving cotton mills and other buildings associated with that industry. As of 2001, the town had a population of 103,544 and an area of around 26 square miles (67 km2).

Source: Wikipedia