Maxime Favier (L) and Pierre Gwenael Bard (R), amateur apiculturists, display green and normal coloured honey produced by their bees in Bernin near Grenoble, September 13, 2013. Bees at a cluster of bee hives in Bernin have been producing honey in mysterious shades of green alarming their keepers who said they now believe their bees gathered sugar from flavoured syrups and juices at a local factory. REUTERS/Emmanuel Foudrot (FRANCE - Tags: FOOD AGRICULTURE)