Blue Honey Mystery Solved: Bees Visiting Local M&M Factory

In 2012, beekeepers in northeastern France were puzzled when their bees started producing blue honey. After a few months of the bizarre phenomenon, beekeepers found that bees were eating the garbage from a nearby biogas plant in Ribeauville that had been processing the waste delivered from making M&Ms.

According to the Independent, Mars operates a chocolate factory near Strasbourg, around 100 km (62 miles) away from the affected apiaries. They were sending their waste to be processed by the Biogas plant in Ribeauville which was not properly sealing/containing the waste, allowing the bees to eat from it.