Since those quotes are from
The Environmental Magazine, Westport, CT , ooo-esss-aayy
, they're likely to be envirofundamentalist bolleaux peddled by some sandal-wearing warmist in dungarees...
In Canada, charcoal is now a restricted product under the Hazardous Products Act. Charcoal briquettes in bags that are advertised, imported or sold in Canada must display a label warning of the potential hazards of the product.