Roundup is a pretty interesting product.
If it gets into lakes or streams, it causes massive dieoffs of amphibians and aquatic invertebrates, tearing the bottom out of the aquatic food chain, and it’s associated with nasty disease outbreaks in fish.
But Monsanto has always said used to say* that Roundup is perfectly safe and harmless because glyphosates are broken down by water…
* their tune seems to have changed.