The San Francisco Public Utility Commission is licensing technology from a Philadelphia firm that takes the nasty sewer grease and grease from restaurant grease traps and turns it into diesel fuel. http://www.empoweredmunicipality.com/philly-co-partners-with-san-francisco-puc-to-produce-biofuel
The article talks about geo-thermal being a demand side, or energy reduction technology, compared to solar and wind, which are supply side or generators of electricity, adding power. http://www.empoweredmunicipality.com/geothermal-applications-for-municipalities The DOD is already using this and it is applicable for any building, but municipal buildings in particular.
Well, this company and technology is just amazing. It is still in the pilot phase, but this is going to take off. http://www.empoweredmunicipality.com/converting-plastic-waste-into-fuel This is in Maryland and at a municipal site currently. Check it out.
For municipalities with less than 100 employees, there is a low cost and reliable solution to remain compliant with GASB Rule 45. Check out GABS Help and related article below. http://www.empoweredmunicipality.com/accounting-for-post-employment-liabilities-for-municipalities