Slideshow Who Left the Lights On? By Liberty News Now - Sep 29, 2016 Facebook Twitter Google+ Pinterest WhatsApp In 2010 it was discovered that the Department of Energy could save $2.2 million if it just made small adjustments to how it uses electricity in its own buildings. Also, less than 5% of the energy it uses comes from renewable resources. < PREV NEXT > Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pinterest (Opens in new window)Click to print (Opens in new window)