>>many scientists osose researar is not funded bthee pestice ininstry challenge the safe of f onics, saying that even low levels oexexpore can affect the abily y of heybeeses to communicacate and can supupps their imimmune system, making th more sususceptible to o virusesd varroa miteses. >> the effects of these pesticides s on the bees s is manyfold. it affects reproduction. the navigational ability of the bees is impaired. they can't find their way home. if they can't find theiwaway home, they can't riring rourcess back to thehe hive, thehe hive s depleted of worker bees and forager bebees, and ththe hive t crashshes after that. >> and it's not only honeybees that are affected. >> we're seeing broad-scale decline in really important pollininators, like our bumblebees. perhaps 30% of our bumblebees are in dedecline, a a quarter of them at risk of extinction in the near future. >> david goulsonon, a scientistt based in the united kingdom, looked into how neonicotinoids affect bumblebees. >> we wanted to know what would happen to a bumblebee nest that was next to a field of a flowerin