A deep geothermal well was used to heat greenhouses in Boise in 1926, and geysers were used to heat greenhouses in Iceland and Tuscany at about the same time.
U Boiseu je 1926. godine korišten duboki geotermalni bunar za grijanje staklenika, dok su se istovremeno gejziri upotrebljavali za grijanje staklenika na Islandu i u Toskani.