Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla An shigar da gonar iska ta farko a Denmark a shekarar 1991.
Tabbas, wani nau'i mai rikitarwa na jumla shine "An shigar da gonar iska ta farko a cikin teku a Denmark a cikin 1991, kuma ƙarfin da aka shigar da gonakin iska na Turai ya kai 3 GW a cikin 2010. "