I'm not sure the problem is how 'dirty' a source is, whatever you think that means. What's important is how much that source increases the net carbon content in

I'm not sure the problem is how 'dirty' a source is, whatever you think that means. What's important is how much that source increases the net carbon content in our atmosphere. Unless you're burning wood (which is a vanishingly small proportion of all carbon release) you're releasing carbon that was bound on geological timescales, which is massively changing that balance.