From an article by Bobby Tanzilo on OnMilwaukee.com:

There are always exciting things going on in Milwaukee Public Library’s Downtown Central Library, 814 W. Wisconsin Ave. But, these days, there is also some excitement on the building’s roof, too.

When the library needed to replace its 25-year-old roof last year, instead of going for a conventional roof, a 30,000-square foot green roof was constructed and 132 solar electric panels were added to generate about 36,000 kilowatt hours of electricity per year. That’s enough to power four homes annually.

“Everyone’s very enthused about it,” says the library’s public services manager Christine Arkenberg, on a recent visit that begins on the library’s first floor, where there is an area dedicated to the green roof initiative.

There, visitors can see books about green issues, view explanatory materials, see a monitor with status updates on how much electricity is being generated, watch a video screen slide show and pick up brochures.