[ashoeafoot]

What could real push a shift would be thermal longtime storage. Basically heatpump heating with a artificial heat stored underground in the summer.

[jandrese]

If you could figure out a way to do this economically you could have a real winner. Ground source heat pumps already exist, but they're so expensive to install that they basically never make their cost back vs. air source heat pumps.

[mulmen]

What geological impacts does heating the ground cause?