Nice concept. The bodypaint is beautiful (did you do it?).
As far as the overall image goes, I like it, but I don't love it. Not sure why, but I think I've narrowed it down to three things. It could be the proportion between mother nature and earth; it could be the crop (think it's stronger if it's cropped tighter.. don need 3/4 body on the model, but you'd lose some of that wonderful paint job); or it could be the background.
For me it's missing something to take it from photo of a concept to a "believable reality". That's why I said the background... if you could turn it onto space, with stars, or mist or something... I think it needs some "depth" to it.