Is consciousness physical or non-physical?

This topic is for debate.
 
My position is that we don't know the nature of consciousness. This means that we can't clearly say that it's physical nor non-physical. If consciousness is physical then it is unlike any other physical phenomenon in that it is subjective - it is private and insensible. There doesn't seem to be any form nor function for consciousness. But yet, I still can't say that it is non-physical because how then does it interact with the brain. As David Chalmers suggests, do new laws of interactions, perhaps some psychophysical laws, have to be discovered to account for this interaction?