"Probably" is a weasel word and does not belong when claiming to have made decisions based on hard science, especially since at least one type of wetter used and mixed in with the final roundup product is (sources I've read) carcinogenic ... sadly the same stuff is used in ... some beauty products ... so no surprise that isn't being waved around.
On the list of herbicides used in my parts, looking at break down products and the LD50 rates, life time in soil, Glyphosate is nowhere near the top of concerning herbicides used. If coincidences is considered acceptable, I've noted the sharp decline in bandicoot population where part of their diet is earthworms and one of the more popular weed killers finding wide use the last few years, has a secondary breakdown product which in high enough concentrations lethal to earthworms.
Disclaimer: I've worked on farms spraying various herbicides on and off for near 30 years. I've always been suspicious of what's been recommended as safe ever since witnessing first hand the genetic damage old 245T formulations (used in our parts N.Q. Aust for ring barking trees) could inflict. This means I usually like to know just how bad something is if I'm using it, use sparingly if there are flags, and personally I won't use half the herbicides used that are considered safe, but roundup I consider moderately safe for the environment since the target weed doesn't need to be saturated to the point of run off for it to work and the work on testing it in the 1950s and 60s prior to Monsanto didn't raise any flags.
