Geothermal’s time has finally come

[John Hollins]

Drill, Baby, Drill

The Economist, 2025 November 18

This article contains more photographs and graphs than I've copied and pasted into a PDF.

[This} is the first shot in an imminent geothermal revolution. Today, less than 1% of global (and American) energy comes from geothermal. But researchers at Princeton University predict that technical innovations mean widely available geothermal power could produce nearly triple the current output of the country’s nuclear power plants (which supply roughly 20% of America’s electricity at present) by 2050. The International Energy Agency envisions a $1trn global investment boom by 2035.

If you can access the website, it will tell you more: 

https://www.economist.com/interactive/science-and-technology/2025/11/18/geothermal-time-has-finally-come?utm_content=ed-picks-image-link-1&etear=science_nl_1&utm_campaign=r.science-newsletter&utm_medium=email.internal-newsletter.np&utm_source=salesforce-marketing-cloud&utm_term=11/19/2025&utm_id=2122600

[John Hollins]

[Art Hunter]

John:

As you know,I have been recovering geothermal energy for 9 years but have only dug down 8 feet where the ground is nearly isothermal at 12C all year.    I only extract enough of this heat, using a heat pump, to pump it up to about 45 C to heat hot water and via a heat exchanger into the furnace ducts to heat the home air volume.   

My system is certainly much smaller, cooler and cheaper than the article you posted.   However, it is not used to generate electricity.   Instead I use solar energy to run the electric motor on the heatpump and use the heat directly.   No need to generate geothermal steam to generate electricity.

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Perhaps the Tangerine Toddler will like this renewable source.

Cheers,

John

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Art Hunter- Canadian Association for the Club of Rome (canadiancor.com)

What we do  (436) CACOR Splash v5 - YouTube

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[John Hollins]

Yes, I haven’t forgotten, Art. If you lived in a remote place on the Canadian shield and wanted to replace electricity generated from diesel fuel, a shallow trench would not deliver. It’s apples and oranges. 

Cheers,

John

On Nov 19, 2025, at 9:39 pm, Art Hunter <art....@gmail.com> wrote:



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