Interesting, to summarise they found neonicotinoid concentrations ranging from 0.24 to 57.3 nanograms per liter — that is, on a scale of parts per trillion. “Parts per trillion is a really, really small concentration,” LeFevre said, roughly equal to a single drop of water plopped into 20 Olympic-size swimming pools.

very harmful to insects but but not as much to mammals. The bees are dying because of this stuff. Everybody needs an activated carbon filter! It filters out a high percentage of all the different types of this poison.