The Art Theme for Burning Man 2007 is "The Green Man".

Peering outward from behind a mottled screen of vines and leaves, the Green Man does not speak or sleep; he waits. His meaning and his origins are largely lost to time.
This year we will appropriate the Green Man and the primeval spell he casts on our imaginations for a modern purpose. Our theme concerns humanity's relationship to nature. Do we, as conscious beings, exist outside of nature's sway, or does its force impel us and inform the central root of who and what we are?