Japan's breeder has had accidents and the reprocessing of their irradiated fuel is where Japan's nuke weapon potential comes from.  France's superphenix has had major problems, too.  The fact that Russia, India and China want this doesn't inspire confidence given their "safety" record.  Breeder reactors make MORE waste than light water reactors due to the plutonium reprocessing (visit the Hanford tank farms to see how that works, or read about "West Valley" in New York state).  It's not "fear mongering" to be opposed to ultra hazardous nuclear waste leaking into the water one's great great grandchildren will drink from.  Radiation damages genes, causes birth defects in future generations.  Overpopulation doesn't have a "solution," we should have addressed it decades ago, but didn't.  Perhaps being efficient and cooperative can mitigate the problem, perhaps not.  Our descendants won't have the energy to babysit the nuke waste.