> pesticides delivered as nanoparticles (particles smaller than 50 nanometers across – a human hair is about 75,000 nanometers wide, for context) sprayed onto t

> pesticides delivered as nanoparticles (particles smaller than 50 nanometers across – a human hair is about 75,000 nanometers wide, for context) sprayed onto the leaves of plants, which then make their way through the plant’s internal vascular system Sounds scary. What if a human or another animal gets sprayed? What if the plants accumulate (and humans eat then) dangerous amounts of substance they were "smart" enough to avoid sucking in when they were not forced?