Kule minyaka ingamashumi amabini idlulileyo, siye sakha ngaphezu kwe-2 yezigidi zeemitha ze-greenhouses zezolimo ezihlakaniphile kunye nezorhwebo kubathengi baseYurophu, eMelika, kuMbindi we-Asia kunye neminye imimandla, ukubanceda bafezekise injongo yokwandisa imveliso kunye nokunciphisa iindleko zemveliso.