Air we breath

An inpression of our air: 78% Nitrogen, 20% Oxygen, a bit less than 1% Carbon Dioxide and Argon... plus all the trace things I didn't include. In the city there's probably more CO2

Anywho, this was my first Blender render... well I've done a couple of dodgy practice ones and I was working on something but I haven't finished it because I couldn't get one part quite right. So here we are, please give feedback... I'm very new to 3D so suggestions are welcome.

Download comes as 1280x1024