In our modern world everybody now has a mobile phone, and it’s very tempting to ditch the idea of keeping your land line at home. This is especially tempting when you find that you just don’t use the land line as often as you used to.
It’s too good to be true isn’t it? Energy from the ground? Either that, or it’s not something you’d even consider if you didn’t live somewhere like Iceland, with an active volcanic system that can easily be tapped for energy.