Yeah, I know it’s a risk, betting on heat from the earth core and all. It could fizzle out in the next bazillion years or so? Funny because I keep track of the ground temp at my place. Two inches down it’s always 55 degrees. Knowing that helps with building heating and some other stuff. If it drops to 54 I’ll start to panic and let you know.
:)
Reminds me that Pres. Bush had geo-thermal heating\cooling and wastewater recycling at his Crawford ranch while Al Gore was buying a monstrosity in Nashville that was said to use 21 times more energy than the average American.