text: What about food? Here is what Christian Kreutz said in January 2011: 
  
  Nutrition is another interesting sector to use open data, which I discovered lately. A last 
  example for food is the whole potential behind bar code scanning - you take your 
  mobile phone to the supermarket and scan products to get the information behind the 
  fair trade certificate or behind the company. In the recent dioxin scandal in Germany, 
  the company Barcoo took information from the ministry of agriculture in Germany, of 
  which farms have intoxicated eggs and offer the info in their app. So, you can check in 
  the supermarket the eggs that are fine and not with your mobile phone. 
  
  Food in supermarkets is only one of thousands cases of "Public Data" from a strategic sector of the 
  
  economy that is huge, essential for creation of local jobs and in deep crisis in many countries in this 
  
  period: traditional, brick and mortar retail and service businesses. 
  
  Consider this explanation by venture capital firm Greylock about why they Invested in Groupon: 
  
  The Power of Data 
  
  Groupon is targeting a market that is huge and broken. Local advertising is a $100 
  billion annual business in the U.S. and consumers spend something like 80% of their 
  disposable income within a couple miles of their homes. Many local businesses still try 
  to attract new customers through that heavy yellow book that gets dropped on your front 
  doorstep until it rots or gets tossed in the recycling bin. 