body: Some time ago a substance used as a food preservative which is believed by some to be carcinogenic was allowed to be used. If in a case like that it is found at the time that it actually is so, is someone legally responsible for allowing it to be used, or at least not warning people about its consequences? I suppose this is something similar to the use of cigarettes, how does this work in these cases?
  
  
  
title: If in a country it's allowed to be sold a product with a harmful chemical, is the government or state legally responsible for it?