Beekeepers in northeastern France say they have produced batches of unusually colored honey in recent months as a result of bees carrying unknown substances from a nearby plant processing waste from an M&M’S candy factory. Since August, beekeepers in the region of Alsace say they have noticed bees returning to their apiaries with colorful substances that have altered the color of their honey, turning it blue and green. After conducting some research, they discovered that a nearby biogas plant has been processing waste from a Mars candy factory that produces colorful M&M’S. The beekeepers, who are already dealing with declining bee populations, are not amused by the batches of colorful honey. “For me, it’s not honey,” Alain Frieh, president of the apiculturists’ union, told Reuters. “It’s not sellable.” While Mars did not respond with a comment, a co-manager for the biogas plant said the company has cleaned its containers and will begin storing incoming waste in a covered facility.