Kammala wannan jumla: Tsarin zagayawar yanayi na duniya yana buƙatar kallon yanayin yamma don hasashen yanayin yanayi zuwa gabas. Tashoshin lura da yanayi a Greenland sun inganta daidaito na hasashen yanayi don Tekun Atlantika da arewacin Turai don fa'idar dabaru a cikin Yaƙin Atlantic da wasan kwaikwayo na Turai na Yaƙin Duniya na II. Greenland ta kasance wani ɓangare na daular mulkin mallaka ta Denmark tun 1814. Greenland ya bayyana ba shi da kariya sosai bayan
Jamus ta mamaye Denmark a ranar 9 ga Afrilu, 1940. Allies na Yaƙin Duniya na II sun damu da yiwuwar sansanonin sojan Axis a Greenland. Ma'adinai na cryolite a Ivittuut ya kasance tushen mahimmancin mahimmancin ruwa don electrolysis na aluminum ores ta hanyar Hall-Héroult tsari don samar da jirgin sama.