Former Sec. of State Gen. Colin Powell may not be the first person you'd think of as a spokesperson for green; Ed Begley Jr. might be the more likely. Both were speakers at this week's Greenbuild event in Chicago. Powell was the keynote opening the event on Wednesday to a crowd of thousands at the Lakeside Center; Ed Begley addressed a smaller group at exhibitor Siemens' event on the eve of the official Greenbuild opening. (more...)