Materials matter: copper resists corrosion and conducts well

https://medium.com/@iortusfkny/soil-microbes-and-electroculture-a-symbiotic-boost-for-roots-e426b7f2ca39

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.