So I read the paper. I’m sincerely curious: how is this new or special? Ground loops have been used for heat pumps for decades, providing both heat source and heat sink. Is what they’re researching qualitatively different from ground loops?

Mindbending. Except for all the things you’ll kill in the soil. Stupid article and idea.

Why don’t we just use the ocean for storing heat, or maybe the sky, OH WAIT…