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This is a list of the census metropolitan areas and agglomerations in Canada by population, using data from the 2021 Canadian census and the 2016 Canadian census. [1] Each entry is identified as a census metropolitan area (CMA) or a census agglomeration (CA) as defined by Statistics Canada.
Polyurethane synthesis, wherein the urethane groups −NH−(C=O)−O− link the molecular units A kitchen sponge made of polyurethane foam . Polyurethane (/ ˌ p ɒ l i ˈ jʊər ə ˌ θ eɪ n,-j ʊəˈr ɛ θ eɪ n /; [1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links.
During the Pre-Islamic era, the city at the site of modern Riyadh was called Hajr (Arabic: حجر), and was reportedly founded by the tribe of Banu Hanifa. [18] [19] Hajr served as the capital of the province of Al-Yamamah, whose governors were responsible for most of central and eastern Arabia during the Umayyad and Abbasid eras.