Don't you fix these things by using the market, fine Cadbury an extra 5% pa of gross revenue if any bars are found with > N ug of any particular heavy metal. Ta

Don't you fix these things by using the market, fine Cadbury an extra 5% pa of gross revenue if any bars are found with > N ug of any particular heavy metal. Tax all companies an extra X% if their products are in the bottom quintile for 2 consecutive years. Maybe don't fine them if they can show a person who eats their products at the 99% level, for a lifetime, would be below the level of toxicity -- the CEO can eat that much of the metal to demonstrate they're convinced that the toxicity figures are correct! In theory the chocolate producers will get a lower price unless they do what they can to reduce heavy metals. Of course the farmers get screwed in places where others have shipped their heavy-metal lawn waste ...