Asbestos is basically chemically inert.
But it’s physically still very damaging.
Even carbon nanotubes are basically inert, but we strongly suspect there will be problems with them because they persist in the environment and are incredibly resistant to breaking down – precisely because of the structural physical strength they have and that’s what we want to utilise them for.
You don’t have to be chemically reactive to be damaging. Swallowing string is harmful to you. Plastic, to small animals, is like string that never breaks. Think fishing line – plastic string, basically.
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