1) They seem to do just fine out on the farm, where the tractors have been using diesel for 70 years,
2) Bees seem to avoid smoke,...always have. Maybe that’s why bee-masters carry around a little can with coals to generate smoke when they are working around the bees.
Sight helps them find nectar I'm close proximity.
Their acute smell helps, them find flowers from a long distance.
They will fly two miles to forage and they can't see a distance of two miles.
Those who say that bees do not use smell to find flowers are incorrect.
Beekeepers use smoke to interrupt their ability to smell and thus communicate via the release of pheromones.