"...treadmills were used as punishment devices for people sentenced to hard labor in prisons."[0]
To grind flour, hence mill. But that is the useful version of the concept. "Reverse treadmill" is what we should call the consumer product that cost emissions to produce&operate (simulate a "load" that needs to be pushed against by a citizen with no where to go).
To grind flour, hence mill. But that is the useful version of the concept. "Reverse treadmill" is what we should call the consumer product that cost emissions to produce&operate (simulate a "load" that needs to be pushed against by a citizen with no where to go).
[0] https://en.m.wikipedia.org/wiki/Treadmill