"Various members of the mustard family are used for phytorememdiation. People eat many members of the mustard family." it's akin to say "water is used to clean

"Various members of the mustard family are used for phytorememdiation. People eat many members of the mustard family." it's akin to say "water is used to clean dirt. People drink water" for every hypothesis, there will always be special case(s) to refute it. thx for your concern, but really, i'm more interested in what you say about the topic: what should we eat? where can we get the polutant-free food?