11/13/12 - Tuesday's Topical Currents looks at South Florida “brownfield” remediation.  Brownfields are hazardous, contaminated sites, usually in older and disadvantaged areas.  They may qualify for federal and state grants for clean-up.  These stipends spur economic development in several ways--including job creation from the restoration project.  They also infuse funds into the community.  The acclaimed Mid-Town Miami development was once tainted with arsenic and petroleum residues.