Originally Posted by magiciansampras
Fish is best done in aluminum foil. It cooks better (more circulated heat) and there is *some* evidence to suggest that fish cooked on the grill directly results in carcinogens.
The carcinogens part also applies to beef as well. The charring it creates one carcinogen, while the other is formed by the meat being cooked at too high a temperature.
NPR had suggestions on how to reduce it.