Sarnia vs Leeds

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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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Leeds is the largest city in the county of West Yorkshire in Northern England, approximately 170 miles (270 km) north of central London. Leeds is the cultural, financial and commercial heart of the West Yorkshire Built-up Area (2011 census classification), the UK's fourth-most populous urban area with a reported population of 1.8 million in 2013.The city is served by five universities, has the UK's fourth-largest student population and the country's fourth-largest urban economy.It has one of the most diverse economies of all the UK's main employment centres and has seen the fastest rate of private-sector jobs growth of any UK city. It also has the highest ratio of private to public sector jobs of all the UK's Core Cities, with 77% of its workforce working in the private sector. Leeds has the third-largest jobs total by local authority area, with 480,000 in employment and self-employment at the beginning of 2015. Leeds is ranked as a "High Sufficiency" level city by the Globalization and World Cities Research Network.Leeds was a small manorial borough in the 13th century, becoming a major centre for the production and trading of wool in the 17th and 18th centuries, then a major mill town during the Industrial Revolution; wool was still the dominant industry, but flax, engineering, iron foundries, printing, and other industries were also important. From being a market town in the valley of the River Aire in the 16th century, Leeds expanded and absorbed the surrounding villages to become a populous urban centre by the mid-20th century.

Today, Leeds has become the largest legal and financial centre outside London with the financial and insurance services industry worth £13 billion to the city's economy. The finance and business service sector account for 38% of total output with more than 30 national and international banks located in the city, including an office of the Bank of England. Leeds is also the UK's third-largest manufacturing centre with around 1,800 firms and 39,000 employees; Leeds manufacturing firms account for 8.8% of total employment in the city and is worth over £7 billion to the local economy. The largest sub-sectors are engineering, printing and publishing, food and drink, chemicals and medical technology. Other key sectors include retail, leisure and the visitor economy, construction, and the creative and digital industries. The city saw several firsts, including the oldest-surviving film in existence, Roundhay Garden Scene (1888), and the 1767 invention of soda water.Public transport, rail and road communications networks in the region are focused on Leeds; the second phase of High Speed 2 will connect it to London via East Midlands Hub and Sheffield. Leeds currently has the third busiest railway station and the tenth busiest airport outside London. Leeds has a less extensive public transport coverage than other UK cities of comparable size, and is the largest city in Europe without any form of light rail or underground system.

Source: Wikipedia