KNOXVILLE — John Nolt, a member of the Sierra Club’s Harvey Broome Group executive committee and professor emeritus in philosophy at the University of Tennessee, will present a program about cryptocurrencies and their detrimental long-term effects on the environment. Cryptocurrency “mines” (data centers, really) pull enormous quantities of power from the electrical grid.

Thus they are attracted to states like Tennessee where electric power is relatively cheap.

The event is set for 7-8:30 p.m. June 11 at the Tennessee Valley Unitarian Universalist Church, 2931 Kingston Pike, Knoxville.