The Green Exchange tenants, many of whom are housed in temporary offices on the third flood of the Baum Building, 1030 West Chicago until the project is complete, have also been busy over the past several months making the world more sustainable.  Here are a few highlights from some of their most recent accomplishments: Mindful Metropolis Magazine hosts the Green Carpet Gala May 21st.  Walk the green carpet this month at Mindful Metropolis’ premier Green Carpet Gala, the kick off party for the Chicago Green Festival, on Friday May 21 at the Marmon Grand.  This event, featuring the Reader’s Choice Awards ceremony, green speakers, and headliner band Funkadesi, will celebrate the magazine’s first anniversary of connecting and showcasing the best of Chicago’s conscious community.  Mindful Metropolis’ publisher, Richard McGinnis, recently became the newest Green Exchange tenant to join the Social Venture Network.  In an effort to do