PUBLISHED ON: April 16, 2008 | Duration: 2 min, 05 sec
Global food prices have risen because food grains are in short supply. Another strong reason given for this is the shift to biofuel, which are promoted as a green alternative to conventional fuels, like petrol and diesel. The use of food for fuel started when the energy crisis forced the world to look for alternatives. Scientists turned to biofuel for energy solutions.