How about this: ask someone what percent of the atmosphere is co2. Usually they’ll have no idea and will guess any where from 10% to 50% or more. Then inform them it is .038%
Yeah, and they whine SO much when they are given brackish water to drink and it's only 0.05% salinity!
Even though some wimps fall over dead with FAR lower concentrations than that of ricin in the air, those little percentages mean nothing...
</sarc>