Heavy equipment causes vibrations in the ground, which most people probably can't notice, but when you're literally printing at the atomic scale, microscopic vibrations probably make a difference.
I work in a lab. We can't use our most accurate scales when there's construction going on with heavy machinery within a couple of blocks. This isn't cutting-edge stuff either, it's measuring to 0.001 gram, with a $10k scale and a 4" thick granite table on rubber pads (unlike other equipment that's on air floating supports with active counter balancing).
Wouldn't they make less difference than the vibrations caused by regular factories? Or should we be adding homeopathic fracking to the list of environmental concerns?
Heavy equipment causes vibrations in the ground, which most people probably can't notice, but when you're literally printing at the atomic scale, microscopic vibrations probably make a difference.