This is about selling more Roundup. In case you don't know what that is, it's a herbicide that would burn your throat if you got a whiff of it.
While I have no love lost for Monsanto and their IP enforcement goon squad, the herbicide in question is a pretty benign substance to work with. Check out the glyphosate page on wikipedia for an overview of it's activity and interaction with people. While it's not something you'd want to intentionally ingest, it's not a potent inhalation or other hazard.