Just Curious

Saw this elsewhere:

I've been lucky enough to drive to Houston 4 times over the last 6 weeks. On all 4 trips, I've passed flat-bed trucks heading north on 45 carrying long, white, metal objects that I can best describe as looking like airplane wings. Does anyone know what I'm seeing?

I've seen the same thing coming through Decatur - but have never been quick enough to snap a picture. I think they are the blades for a wind turbine used for electricity purposes. But I could be wrong.