James and Nicole Fary for all their encouragement and support over the years
Alex Kougianos of Supreme Air, LLC
Kate Maclean for content editing
Richard and Nicholas Hall for general proofreading
Joseph Moeller for content advice
The US Department of Energy for providing leadership and resources about geothermal

Images

John Husser for photos of his installation in Blacksburg, VA
Mark Lindemulder of BMP Supplies for permission to use the silt bag picture
Mark Glasspool of RHI Energies for permission to use the drawings of the vertical loop configurations
Jason Ingram of Ingram’s Water & Air for photo of horizontal configuration
Peter Greenberg for picture of Carmine Carro Community Center in Marine Park in Brooklyn, NY used in bonus video
Wikimedia Commons and all those who share their work in it, including Adrian Pingstone
Pixabay