Volcanos work, too, but there are no commercial applications of them, even though the energy contained within could power entire cities for years.
Even with known and proven natural phenomena of smaller dimensions than volcanos, harnessing them is a huge challenge. It was proven that some people can smell Parkinson's [1], and this is probably caused by changes in the sebum (skin oils) of the patient. There are likely other potential diagnoses by smell (lung cancer [2], infections [3]), but despite reading about future electronical noses for about a decade, there are none deployed in clinical settings.
[1] https://www.theguardian.com/society/2022/sep/07/woman-who-ca...
[2] respiratory-research.biomedcentral.com/articles/10.1186/s12931-021-01835-4