Kusanaya kwemvura kwegore rino kwave munzira yekuve kwakaipisisa iyo mafuro akambonyora uye akaipisisa muCanada, sekutaura kwaJohn Pomeroy, sachigaro wekutsvagisa muCanada mune zviwanikwa zvemvura uye shanduko yemamiriro ekunze kuYunivhesiti yeSaskatchewan. Yatove yakaipa kupfuura kusanaya kwakanyanya muna 1961, akadaro.
Bonnie Allen uye Theresa Kliem quote Pomeroy mune mushumo we CBC Nhau dzichiti: "Kwayedza kuchidaidza kuti [kusanaya kwemvura] kwakanyanya panguva ino, asi zvine zvimiro zvese zvekunanga munzira iyoyo," akadaro Pomeroy.
Kusanaya kwemakore gumi kwakarova Saskatchewan muma1930, asi nzvimbo senge kuchamhembe kweAlberta nekuchamhembe kweSaskatchewan hadzina kubatika panguva iyoyo, akadaro. "Hakuna nzvimbo dzakadai izvozvi," akadaro Pomeroy.
Mamiriro acho anowedzera kupfuura Canada, akadaro, nekusanaya kwakanyanya muhafu yekumadokero kweUnited States, nharaunda yeMediterranean, Kazakhstan neRussia, pamwe nemakore ekusanaya kwemvura muAustralia.
Remangwana revarimi rinoramba risina chokwadi, pamwe nekufungidzira kwekusanaya kwakanyanya pamwe nemafashama.