quote:Originally posted by SouthHillbilly
Coal contains more organic compounds (mostly hydrocarbons and many carcinogenic) than any other naturally occuring substance. I would NEVER want to cook over coal.
Lord have mercy! Not only have lots of people cooked over coal in times past but somebody here recently waxed poetic about coal-burning pizza ovens and I got grief for suggesting wood-burning ovens might serve.
What, after all, is coal but compressed vegetation (i.e wood, leaves etc) and mud/silt that got mixed with it. The first stage of coal formation is peat and peat fires have been used as the main source of heat for, among other things cooking, in parts of the British Isles for generations.
Have you any idea of the "organic compounds" found in wood? For that matter, human beings are made almost entirely of "organic compounds" and water. "Organic" chemistry is the chemistry of the carbon/hydrogen/oxygen/nitrogen molecules of living matter. But you are right that coal has more organics than wood per unit volume because coal is denser than wood, having been compressed (diamonds, by the way, have even more--oh, the horror!).
Coal does indeed have some carcinogens and burning tons and tons of it in a power plant produces enough toxics and pollutants to be of concern, but in the quantities burned in a BBQ you should probably be most concerned about tarry byproducts of combustion of EITHER wood or coal.
In other words, if you are worried about your health, I wouldn't eat BBQ because that smoke we love to taste can kill us all.