Last night, the Washington, D.C. Nationals baseball team played their season opener in a brand new, eco-friendly stadium built by the city with $611 million. 

Donning a red Nationals jacket, President Bush threw out the first pitch - high and inside - in front of 40,000 cheering fans to inaugurate the new stadium and usher in the season.

The stadium utilizes a variety of innovative green design features, including energy-efficient light fixtures, low-flow toilets, recycled building materials, and was built on a restored brownfield that once had contaminated soil.  A 6,300 square foot rooftop garden hovers above the concession area to absorb rainwater and reduce runoff to the nearby Anacostia River. 

The ballpark is also fitted with a water filtration system that filters and treats waste and rainwater before releasing any into sanitary and stormwater systems.

For its innovations as the nation's leading green sports complex, the stadium received a silver LEED, or Leadership in Energy and Environmental Design, certification.

The ballpark was built by Clark/Hunt/Smoot, a joint venture composed of Clark Construction Group, LLC of Bethesda, Maryland; Hunt Construction Group of Indianapolis, Indiana; and Smoot Construction Company of Washington, DC.