1. 
   Rustbelt
   [n] - urban areas in New England and Middle West characterized by concentrations of declining industries (steel or textiles)
   Found op http://www.webdictionary.co.uk/definition.php?query=Rustbelt
   
   
2. 
   Rustbelt
   noun urban areas in New England and Midwest characterized by concentrations of declining industries (steel or textiles)
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=Rustbelt
   
   
3. 
   rustbelt
   1) Pittsburgh, akron et al. 2) Populated area 3) Rustbelt 4) Urban area
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/rustbelt/1
   
   

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