At www.twinmountainfence.com, you can order rigid fiberglass rods that wore out from being used on oilfield pump jacks, and they make great fenceposts for electric fencing. They last a long time and are fire resistant. The company also sells cotter pins and wire clips. Because of their availability, they are fairly inexpensive.
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Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars