One theory is that glyphosate causes harm because it gets weaved into protein chains instead of glycine. Proteins made with roundup don't work the same as proteins with glycine. Experiments to figure out if this is what's happening would be relatively simple and cheap.
Now that lots of weed are resistant, farmers will have to figure out how to farm without this shortcut. Roundup is obsolete, so nothing of value will be lost.
[0] https://en.wikipedia.org/wiki/Glyphosate#Chemistry
One theory is that glyphosate causes harm because it gets weaved into protein chains instead of glycine. Proteins made with roundup don't work the same as proteins with glycine. Experiments to figure out if this is what's happening would be relatively simple and cheap.
Now that lots of weed are resistant, farmers will have to figure out how to farm without this shortcut. Roundup is obsolete, so nothing of value will be lost.