I remember I made a twin chamber smoker and first BBQ I went to buy wood was quite supprised at the cost but then found wood brickets slow burning and cheap duly purchased what a terrable mistake how I didn't poison anyone heaven knows all the food had a rather plastic taste it was only then I investigated what these brickets were actually made from and its ingreadants included things like recycled chip board and marine ply I guess the taste was from the glues within these products
Whilst Our loft/roof was being done, I did accidentally burn a pice of modern treated timber, never again, god knows what they do to it, obviosuly it buys you time to get out the house alive, but it smiokes like hell and stinks.
tyres are much better.