Luke Griswold-Tergis and Michael Loranty frequently go to a research station called Pleistocene Park, which is run by a father and son, Sergey and Nikita Zimov. They tell Metta that the Park shows that herds of large herbivores reduce the soil temperature. This can keep permafrost from melting. More research is certainly needed.

https://youtu.be/atEI-5-_Yg4

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