1. 
   Public interest
   The common good.
   Found op http://www.bized.co.uk/reference/glossary/index.htm?glosid=704
   
   
2. 
   Public interest
   The public interest refers to the "common well-being" or "general welfare." The public interest is central to policy debates, politics, democracy and the nature of government itself. While nearly everyone claims that aiding the common well-being or general welfare is positive, there is little, if a...
   Found op http://en.wikipedia.org/wiki/Public_interest
   
   

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