Sarnia vs Davao 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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Davao City, officially the City of Davao (Cebuano: Dakbayan sa Dabaw; Tagalog: Lungsod ng Davao), is a 1st class highly urbanized city in the island of Mindanao, Philippines. The city has a total land area of 2,443.61 km2 (943.48 sq mi), making it the largest city in the Philippines in terms of land area. It is the third-most populous city in the Philippines after Quezon City and Manila, and the most populous in Mindanao.  As of the 2015 census the city had a population of 1,632,991. It is geographically situated in the province of Davao del Sur and grouped under the province by the Philippine Statistics Authority, but the city is governed and administered independently from it.

The city is divided into three congressional districts, which are subdivided into 11 administrative districts with a total of 182 barangay. Davao City is the center of Metro Davao, the third-most populous metropolitan area in the Philippines. (As of the 2015 census this had a population of 2.5 million, compared with Metro Manila's 12.8 million and Metro Cebu's 2.8 million.) The city serves as the main trade, commerce, and industry hub of Mindanao, and the regional center of Davao Region. Davao is home to Mount Apo, the highest mountain in the Philippines. The city is also nicknamed the "Durian Capital of the Philippines".

Source: Wikipedia