The General Services Administration is out to show that even a relatively new building can become more energy efficient. GSA is seeking a contractor to make a number of energy-savings improvements to the Ronald Reagan Building and International Trade Center in Washington, which opened in 1997. GSA plans to install high-performance heating and air conditioning systems, tune up building system controls such as motors and sensors, and install more energy-efficient lighting. The GSA-owned facility already adheres to green building practices such as using sustainable landscaping, recycling, giving procurement preference to green products and encouraging employees to commute to work using public transportation or…