http://grist.org/list/wisconsin-hospital-is-powered-by-beer-and-cheese/
"The hospital system has been sourcing biogas from a local brewery and
from a dairy farm that makes mascarpone and fresh mozzarella cheese. And
recently the system started getting gas from a La Crosse landfill, as
well."
"Energy independence makes sense for the environment, but it also makes
financial sense for the hospital, which is saving gobs of money."