The chemical industry has a bad rup because of environmental impacts. But we are naive if we think that unpleasant externalities, as economists would call them, only started with the industrial revolution. Elizabeth the first quired that any wod production, which was the european indigo, be far away from any of her palaces because of the smell from it. An indigo is nothing compared to tyrian purple, the ancient shellfish purple that was highly prized in roman times.