Apogee Stadium LEED Platinum certification, the highest level awarded by the U.S. Green Building Council. The points-based ratings system measures various environmental aspects including water efficiency, energy conservation, indoor air quality, and sustainability. "Dallas Business Journal" named the stadium the "Green Project Deal of the Year" in 2012, and "Engineering News-Record" named it the year's "Best Green Project". The stadium was named as one of the four finalists during the World Stadium Awards Congress for "most sustainable stadium design concept", but lost to the London Olympic Stadium. Apogee Stadium is located on Bonnie Brae Street at the junction of Interstate 35 East
Liquid apogee engine be prohibited or restricted in the near- to mid-term. Exemptions are being sought to allow to be used for space applications, however to mitigate this risk, companies are investigating alternative propellants and engine designs. A change over to these alternative propellants is not straightforward, and issues such as performance, reliability and compatibility (e.g. satellite propulsion system and launch-site infrastructure) require investigation. The performance of an apogee engine is usually quoted in terms of vacuum specific impulse and vacuum thrust. However, there are many other details which influence performance: A typical 500 N-class hypergolic liquid apogee engine has a vacuum specific