Bernie Madoff's investment strategy was far from sustainable. But his prison is!That's right. Madoff's clink is the nation's first LEED-certified prison. A LEED rating is the U.S. Green Building Council's measure of environmentally sustainable design and construction. According to Correctional News, the facility has bike storage for employees, alternative fuel filling stations, low-flow showers for inmates, and uses "green" cleaning products.Bilked investors may not reap any green from Madoff's environmentally friendly incarceration. But perhaps they'll take comfort in knowing that his once-giant footprint has shrunk.