hydro
Hydro (adj) means (informal) Short for hydroelectric.
Fill the gap
Can you complete this real example?
He grows tomatoes in a _____ setup in the spare bedroom.
Etymology
From the prefix hydro-, from Ancient Greek ὕδωρ (húdōr, “water”). By surface analysis, hydr- (“water”) + -o-. The Canadian "electricity" sense is owing to hydroelectricity being the prevalent source of electricity in much of Canada and many electric companies having the word Hydro in their names.