Sarnia vs Guangzhou City

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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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Guangzhou (; simplified Chinese: 广州; traditional Chinese: 廣州, Cantonese pronunciation: [kʷɔ̌ːŋ.tsɐ̂u] or [kʷɔ̌ːŋ.tsɐ́u] (listen); Mandarin pronunciation: [kwàŋ.ʈʂóu] (listen)), also known as Canton and formerly romanized as Kwangchow, is the capital and most populous city of the province of Guangdong in southern China. On the Pearl River about 120 km (75 mi) north-northwest of Hong Kong and 145 km (90 mi) north of Macau, Guangzhou has a history of over 2,200 years and was a major terminus of the maritime Silk Road, and continues to serve as a major port and transportation hub, as well as one of China's three largest cities.Guangzhou is at the heart of the most-populous built-up metropolitan area in mainland China, which extends into the neighboring cities of Foshan, Dongguan, Zhongshan and Shenzhen, forming one of the largest urban agglomerations on Earth, the Pearl River Delta Economic Zone. Administratively, the city holds subprovincial status and is one of China's nine National Central Cities. At the end of 2018, the population of the city's expansive administrative area was estimated at 14,904,400 by city authorities, up 3.8% from the previous year. Guangzhou is highly ranked as an Alpha- (global first-tier) city together with San Francisco (the U.S) and Stockholm (Sweden). Guangzhou also ranks 21st globally (between Washington, D.C. and Amsterdam) and 8th in Asia (behind Shanghai, Tokyo, Hong Kong, Singapore, Beijing, Shenzhen and Dubai) in the 2020 Global Financial Centers Index (GFCI). There is a rapidly increasing number of foreign temporary residents and immigrants from Southeast Asia, the Middle East, Eastern Europe and Africa.

This recent population influx has led to it being dubbed the "Capital of the Third World".The domestic migrant population from other provinces of China in Guangzhou was 40% of the city's total population in 2008. Together with Shanghai, Beijing and Shenzhen, Guangzhou has one of the most expensive real estate markets in China. In the late 1990s and early 2000s, nationals of sub-Saharan Africa who had initially settled in the Middle East and other parts of Southeast Asia moved in unprecedented numbers to Guangzhou in response to the 1997/98 Asian financial crisis.Long the only Chinese port accessible to most foreign traders, Guangzhou was captured by the British during the First Opium War. No longer enjoying a monopoly after the war, it lost trade to other ports such as Hong Kong and Shanghai, but continued to serve as a major transshipment port. Nowadays, in modern commerce, Guangzhou is best known for its annual Canton Fair, the oldest and largest trade fair in China. For three consecutive years (2013–2015), Forbes ranked Guangzhou as the best commercial city in mainland China. Guangzhou ranks 10th in the world and 5th in China (after Beijing, Shanghai, Hong Kong and Shenzhen) in terms of the number of billionaires according to the Hurun Global Rich List 2020.The city is home to many of China's most prestigious universities, including Sun Yat-sen University, South China University of Technology, South China Normal University and Jinan University. Guangzhou is also one of the top cities in the world by scientific research as tracked by the Nature Index and it ranks 15th globally and fifth in China (after Beijing, Shanghai, Nanjing and Wuhan).

Source: Wikipedia