Pop star Shakira will perform before the World Cup final in Rio de Janeiro on July 13, headlining a .
More than 50 billion chickens are reared every year for food - both for their meat and their eggs.
In the 1960s chicken was viewed by many people as a treat and they ate less than 1kg of it a year. Today this amount has grown to almost 2kg each month.
- Largestfastestsmartest.com; citygirlfarming.com