[nemo44x]

Pressure treated woods scraps are generally thrown in dumpsters and they are toxic if burned. You never burn pressure treated wood.

You just never know though. For instance, it could be thought that there isn't any asbestos in the home being renovated. But maybe there were a couple pieces of drywall or pipe insulation that happened to have asbestos and it wasn't noticed. It happens.

There is also a very good chance that there's lead dust and chips from old paint or pipes that's being thrown in as well. Probably don't want to make charcoal or anything out of that or any new SPF/Doug tossed in there that maybe got some of it on it you don't notice.

[hanniabu]

Isn't new pressure treated wood safe to burn because they no longer have the nasty chemicals they used to put in them?

[waldothedog]

There are a range of treatment methods, some of which have fallen out of mass production but none are recommended for burning