Talk:Firebending/@comment-856627-20120520140118/@comment-207.233.76.9-20120523172426

It's because Air, Water, and Earth are either inherently constructive or essential for life. While Fire (unless expertly controlled) is inherently destructive.

Water=essential for life

Air= essential for life

Earth=grows food, used to construct buildings and shelter

Fire= burns, consumes, and destroys all by itself and when it is used constructively by man it's almost always used to construct weapons.