onthird ofood proded in the u.sdepends honeybe polination e arputting at risk several hundred billion dollars productvery yea its significanbecause th cro that are llinated a some of them that really add diversity and vitality to our et. >> honeee loss have be linkedo multip factors ke pestides, hatat deadation,alnutritn, pathoge, and vaoa mite iestation for pesticide manufacturer bayer crop science, the issue is clear. >> mt expertagree that the single greatest threat to honeee healtis the vroa mi, an invive bloosucking pet that bh direct pasitizesyoung d adult be and vectors bee diseases. where varroa mites are absent or well controlled, honeybeesre thrivi. >> but jim says he knows why his bees are dying. >> we had a multitude of neonics that were showing up in our bees. it doesn't take much to kill a bee. neonicotinoids are a relatively new class of ide and comi on the scene in the 1990s. it is the fastest-growing group of insecticides in the united states. >> for the companies that make them, neonicotinoids, or neonics, are big business. they bring in over $2.6 billion a year in g