Ok, let's compare as you say. Regarding chemical build up in environment, are you suggesting the result of petrol combustion in vehicles is less of a concern than the use of roundup??
The fumes released while filling up are a concern for some.
They did take the lead out of petrol! Some of the intelligensia have indicated the hazards of the new additives are of much greater concern, not to mention the carbon monoxide that damages ozone and contributes to global warming!
Additionally, just how much instruction is given to drivers regarding the dangers of petrol or the exhaust 'bullets' of vehicular 'weapons' , or how to reduce its 'footprint' before licencing?
I'm all for alternatives to internal combustion engines. If we ban roundup NOW, will you next propound we revert to horse and buggy - and sheep??