I thought Joe might find this amusing. So Audric, my middle one who's a half month shy of 2 showed us he had learned a new word at lunch yesterday - geothermal. He has no clue what it means, but he finds it funny that it surprises us and amuses us. He proceeded to use the new word at bath time by saying "my geo thermal" during his bath. Not sure what he means by my, you been giving him a sales pitch for his own private system Joe?

actually the only add on system was one the excavator and I discussed for the deer blind
J

More seriously, and Seneca reminds me of an excellant point, I have had high school students who do geo study as a project either assigned or extra credit. There are oppurtunities here for technology presentation to students and improved awareness. Many of my customers are the children or grand children of previous customers. If you happen to be known as the geo guy around school that can have obvious benefit to sales for the practical minded or for the broader appeal you can help educate young people to alternative heat/cool plants.
For the buyers of geo you may have an oppurtunity for your young men or women to be involved in the project and perhaps benefit academically, and even in some cases find a career path (I'll forgive those of you who don't wish my job on your children, but most of the engineers I know select paths based on trying to figure out how something works) your grand kids could do worse than having a mechanical engineer for a mom or dad. Green tech will likely be the fastest growth area in the next decade.
Joe

It does make me wonder what my grandkids might ask about my profession -
"you mean you used to be paid to tell computers what to do? Why? You just tell them, and they do it."
"No, no, you used to have to use special tools to tell them how do it, they didn't just speak English. Also, they used to be shaped like little boxes and you had to hook a lot of wires up to them"
"Ok, now I know you're kidding me."
Oh well, it's a good thing computers only way 1.5 tons now -
"Computers in the future may weigh less than 1.5 tons." Popular Mechanics, 1949