Senator Mark Udall (D-CO) unveiled draft legislation June 8 that would encourage the Department of Defense to reduce fossil fuel consumption and increase its renewable energy use and energy efficiency. The Department of Defense Energy Security Act of 2011 includes a broad range of measures from authorizing funding for energy efficiency improvements to requiring a study on incorporating high-efficiency propulsion systems in tactical vehicles. Senator Udall and Representative Gabrielle Giffords (D-AZ) introduced similar legislation in the 111th Congress, and the Senator plans to offer sections of this year’s bill as amendments to the fiscal year 2012 National Defense Authorization Act, which will be marked up this week in the Senate Armed Services Committee.