There are also Coal-mine-fires, especially in China
that produce more C02 than the whole traffic sector in Germany.

So instead of trying to reduce traffic with regulations,
it would be much more effective to spend the same
money into coal-fire extinguishment...

In the end, the climate is so complex, that I doubt any
projections about gloabal warming.
We simply cant know.
The projections are more or less founded guesses