Wedding deco ideas for a 4 elements themed wedding

I am having an outdoor wedding/reception in late July of 2011. My colors are mostly inspired by fire, but I would like to represent all 4 elements(earth, wind, water and fire) into the deco. I have earth, fire and water covered. I am stuck on wind. Anyone have any ideas on how I might be able to work that into my deco?

As a side note, this is more of a large intimate and casual reception/pigroast in my sisters backyard.