Regardless of these 'toxins' - I'm sure if you evaluated the toxicity and exposure to chemicals in an average household it would be probably exceed that of industrial labs in the past. Think deodorants, washing-up liquid, detergents, hand-washes, shampoos riddled with obscure-and-difficult-to-pronounce ingredients, cleaning liquids such as bleach. Forget the risk of being exposed to manganese within a steel can - we are already actively polluting our households and probably breathing in higher amounts of nasty chemicals hidden in household products than the examples mentioned in the article.