I once tossed a spent Christmas tree in a fire.  I was burning trash.  It amazed me what happened.

You've probably seen people on TV or in the movies light things things on fire with gasoline.  An understatement.   Gas is powerful.  I found a video of a Christmas tree being ignited.  One watered tree vs. one non-watered.

Here's the you tube video.

I have a 4 foot tree that rolls up like a doormat.  Mom's idea.

Pablo Demetrio Scapinachis Armstrong