The Washington Nationals' new $611 million ballpark will go green (HOK rendering below)
according to this article.
The D.C. Sports and Entertainment Commission authorized changes to the stadium design, including the $1.2 million it will cost in order to become certified as a "green building."
"That was the original design goal, to come up with the very first green sports facility in the country and we think we've done that," D.C. Sports and Entertainment Commission spokesman Tony Robinson says.
A "green" certification won't cost the city additional money -- the $1.2 million will come from the original $611 million budget.
One of the elements that will make the stadium "green" is a filtration system, designed exclusively for the Nationals ballpark.