With more than 360,000 buildings, 650,000 fleet vehicles, and $460 billion in annual purchasing power, the federal government has an obligation to lead by example when it comes to its environmental, energy, and economic performance. Demonstrating a commitment to this principle, President Obama signed an Executive Order on federal sustainability in October 2009 that directed federal agencies to reduce their greenhouse gas pollution, meet a number of energy, water, and waste reduction targets, and leverage federal purchasing power to promote environmentally responsible products and technologies.