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: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on Tumblr (Opens in new window) Tumblr Share on Reddit (Opens in new window) Reddit Share on Pinterest (Opens in new window) Pinterest Print (Opens in new window) Print