yeah
For outdoor fires, yes.
seems like it might make good tinder
firewood is made from cutting down trees and cutting and splitting the wood into suitable sized pieces for firewood. this can be for eg by using a chainsaw and an axe or by firewood processor
On a firewood rating sheet I have, Osage Orange or Hedge tree, is ranked the highest for heat output at 100. Ash is 73, white oak is 80 and mulberry is 79. It ranks mulberry as "excellent" for firewood, low smoke with a good aroma, however it does throw sparks.
When you dry firewood so that it is seasoned and really good to burn.
Very good
Very good
You can recycle Christmas trees at the evergreen disposal place where they will take in old trees and use them for firewood. They will dispose of it properly for you.
Black Oak is great firewood. It's nearly as good as White Oak, which (along with hickory) tops the list for firewood BTU output here in the Northeast.
Kintalin and firewood
Because there is such a thing as valleys and grasslands that do not have trees and branches to use as kindling.