What is more unhealthy, tobacco smoke or incense smoke?

What is a more unhealthy place to be in, one with tobacco smoke or incense smoke hanging in the air? Tobacco fascists please keep out of this, I need a proper answer.
Update: @ Just do it: I just didn't think anyone would have thought I meant strain of Hash! I mean things like Francincense, myrrh, wormwood, Dragons blood, that sort of thing, ritual burning incense!
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