Are humans contributing only 3% of CO2 in the atmosphere?

Potholer54 explains what is meant when people say humans contribute 3% to CO2 added to the atmosphere per year, whether it is true or not, where did such figures come from, and would it matter if it is only 3%.

See original video for actually vetted sources. Copy/paste copies YT's shortening of the URLs...
transmorpherjokingly says...

Why can't the conspiracy theory people ever believe in conspiracies that might benefit humanity.

E.g. instead of believing in a conspiracy of "global warming is just a conspiracy to make us pay more tax" why can't they believe instead that "lizard people from the middle of the earth have taken over the government and want to make the surface habitable for their dinosaur kind by releasing excess CO2"

And that way even their reasoning is still beneficial to humanity's progress, since stopping the CO2 would also be stopping the lizard people from the middle of the earth.

entr0pysays...

Good point, now that we live in a society where there is no consequence for lying, it would be nice to see more noble lies.

https://en.wikipedia.org/wiki/Noble_lie

transmorphersaid:

Why can't the conspiracy theory people ever believe in conspiracies that might benefit humanity.

E.g. instead of believing in a conspiracy of "global warming is just a conspiracy to make us pay more tax" why can't they believe instead that "lizard people from the middle of the earth have taken over the government and want to make the surface habitable for their dinosaur kind by releasing excess CO2"

And that way even their reasoning is still beneficial to humanity's progress, since stopping the CO2 would also be stopping the lizard people from the middle of the earth.

TheFreaksays...

How's this for a conspiracy?

Politicians are colluding with powerful industries to spread disinformation that man-made climate change is a hoax, for financial gain.

Naw, that's too crazy.

bcglorfsays...

TLDW version:

Of the CO2 pumped in to our atmosphere every year, human emissions only make up 3-4% of the total. Natural CO2 emissions globally DO greatly dwarf our burning of fossil fuels and other activities. This is an entirely undisputed fact, and is universally accepted and agreed upon.

As for global greenhouse effect, the CO2 remaining in the atmosphere contributes between 10-30% of the energy being trapped depending on how you count it. This is again an entirely undisputed fact, universally accepted and agreed upon.

Yes, CO2 is a small(ish) part of the global greenhouse effect, and yes, humans only add an extra 3% per year to existing natural emissions. That 3% can add up if it doesn't leave the atmosphere and builds up year over year. We have measured for it, and see that is in fact happening. We have measured the resulting warming and energy inputs and it is in fact warming.

If people want to observe those fractions of fractions stretch out error bars on analysis and projections, that's more fair. Your error bars get magnified a couple times along the way. Most of the time good scientists take that into account, although some have certainly been much less rigorous when speaking publicly than when publishing(Yes, I'm looking at you James Hansen).

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