Scientists find that 900 MHz radio frequency electromagnetic waves have effects on honeybees. See Migdal and coworkers { The Influence of an Electromagnetic Field at a Radiofrequency of 900 MHz on the Behavior of a Honey Bee }. I, Reginald B. Little (RBL), note the bees eat nectar more from C3 plants and produce honey from nectar more from C3 plants. As C3 plants are more depleted in 13C stable isotope, the honeybees are less enriched with 13C. The lower amount of 13C in the honeybees causes their body tissues and organs to be less electrically conductive. Bees use electric fields and charge flow in their bodies for detecting flowers and in collecting nectar. The author (RBL) proposes that the depletion of 13C in their bodies causes them to detect tiny electric fields in the flowers for finding nectar. Such greater conductance and sensitivity to tiny electric fields thereby causes the 900 MHz radio frequency waves to have greater harmful effects on honeybees for explaining the effects in this recent study of Migdal et al. It is important to note that low amounts of 13C in molecular wires have been measured to cause greater conductance. Enriching the same molecular wires with 13C reduced the electrical conductivity in the molecular wires. See { The Conductance Isotope Effect in Oligophenylene Imine Molecular Wires Depends on the Number and Spacing of 13C-Labeled Phenylene Rings | ACS Nano }. RBL notes similar effect of increased conductance in molecules in honeybees as in the molecular wires in general with decreased amount of 13C stable isotope.