Well you should have read it vegore commenting.
How embarrassing.
The IPCC points out that ongoing climate change poses a threat to the well-being of humankind, societies, and the natural world
Fossil fuel search, extraction, transportation, and combustion have led to a dramatic increase in greenhouse gas emissions – the cause of climate change – compared with pre-industrial times. Between 2010 and 2019, emissions reached the highest peak ever recorded.
Some IPCC data on energy: in 2019, coal contributed to 33% of all human CO2 emissions, followed by oil (29%) and gas (18%).
I understand that we have added to the CO2 level, no question in my mind.
The open question and one that connects back to the statements by your citation,
is how sensitive is the climate to added CO2.
It is all basically SWAGs, as we have no way to measure it.
Even just then amount of forcing doubling the CO2 level causes is pure conjecture,
it is not based on any known physics.
Yes, CO2 can and does absorb 15 um photons, and the excited energy state will pass off that energy ether through contact,
or spontaneous emission, or very unlikely stimulated emission. That said there is no way to say how much warming would result
from an increase in the CO2 level. The observed data is highly subjective, as to which portions of the warming were caused by which event.
Some of the warming before 1950 could be from increases in Solar output, Some portions of the warming after 1985
are clearly from changes in Earth's reflectivity and aerosol clearing.
What remains after those cause are subtracted off is Unknown and could be attributed to increases in greenhouse gases,
but the "Could" is dependent on what other causes of warming we find.