Materials matter: copper resists corrosion and conducts well

https://www.scribd.com/document/1034127335/The-Environmental-Footprint-of-ElectroCulture-Gardening-206505

Materials matter: copper resists corrosion and conducts well, while galvanized steel is cheaper but heavier; choose durable wood or bamboo for masts, and avoid treated lumber that may leach chemicals.