Don’t the Christians say the world will be destroyed by fire? If so, what kind?
I interpret the actual destruction of the world by fire coming many millennia after the second coming of Christ.
As for a description of the end of the thousand year period ( and these could be interpreted as prophetic years ) AFTER the second coming of Christ, start here: http://www.biblegateway.com/passage/?search=Revelation+20&version=KJV
Live fire.
could be nuclear fire
could be small arms fire
could be ordinary fire as in forest fire
could be an infection referred to as ‘fire”...aka biological warefare.
could be an asteroid causing planetwide sterilization via atmospheric fire.
could be electricity of some kind