Todd is currently suffering from waterretention in his legs and is planning to take a couple of weeks off training over Christmas to try to get over it.
Instead, the living roof acts as a natural filtration system, with excess storm water collecting in retention ponds before flowing into the nearby Rouge River.
Usually the water problem is a natural one of scant rainfall or the absence of topographical means of collection and retention, such as mountains for snowpack or lakes and flowing rivers.