[Gondring]

I think that any site that lists only 33 billion tons per year of CO₂ is severely underestimating (even if it were a unit confusion between short/long/metric tonnes). A USGS estimate is 130 million tonnes per year.

Be sure you're not confusing billion with million. Volcanic activity is in hundreds of MILLIONS of tons/year. Human output is in tens of BILLIONS of tons/year. And recall...much of humanity's contribution is not from automobiles.

In any case, the total anthropogenic CO₂ output is

[Gondring]

WEll, I’m not doing a great job typing today. That post wasn’t correct either. I meant “overestimating,” of course.

[AndyTheBear]

Thanks.

I think the USGS seems authoritative enough to trust on this one. It does seem the Global Warming Swindle documentary messed up with on that point. I hope they edit that part.

Side note: I'm probably going to be a way from FR at least a few days as work on stuff I actually get paid for. Its been fun poking my nose into this debate.

[steveab]

If you look at the notation the billions refer to total carbon output.