NEVER burn lumber in a fireplace. its been treated with chemicals and preservatives you dont want to breathe!
no
Check with Martin for an owner's manual. Unless a fireplace is specifically rated as multi-fuel, a gas fireplace cannot safely burn wood.
No, it is not safe to burn. It is toxic.
yes you can burn cactuse
You really should not burn ANY solid fuel in a gas fireplace.
I do.
Yes.
quite good to burn indeed!
yes
Yes.
yes