We need to know the percentage of warming since 1975 that was caused by CO2, if any.
We need to know why there is no evidence before 1975 that CO2 has even been the "control knob" of the global average temperature.
We need to know how rising CO2 from 1940 to 1975 could be accompanied by global cooling (as reported in 1975 -- that cooling has since been "adjusted away"), while from 1975 to 2021, rising CO2 was accompanied by global warming.
We need to know the where and when of warming, not a single global average temperature, that not one person lives in.
We need to know why the pleasant warming in the past 325 years should be considered a problem.
We need to know why 64 years of predicting a coming climate crisis have been wrong.
The coming climate crisis, of course, is nothing more than a prediction -- a prediction that began with oceanographer Roger Revelle in 1957.
And climate predictions have been notoriously inaccurate in the past 64 years.
All of these unanswered questions add up to one conclusion: Climate science is far from settled science.
The radical actions proposed to "fight" climate change are the true climate emergency !
The UAH satellite compilations of the global average temperature are valuable for several reasons:
- They measure in the troposphere, where the greenhouse effect occurs
- Satellites have near global coverage, unlike the surface temperature measurements, which include lots of guesses (aka "infilling") that can never be verified.
- The troposphere is never affected by economic growth, population growth, or land use changes.
-- The scientists who compile UAH data do not believe in a coming climate crisis, and have not predicted a coming climate crisis -- so they don't need to report lots of warming to make their predictions look more accurate.
Even with all those advantages, there is no way to be sure UAH numbers are as accurate as they are claimed to be.
But they do have the potential to be more accurate than surface measurements.
Because surface measurements have a large amount of infilling (guesses) and have been subjected to repeated "adjustments" over many decades, such as gradually "disappearing" the global cooling from 1940 to 1975.
The UAH temperature statistic is a check and balance for surface measurements made by government bureaucrats who can not be trusted.
Every scientist seems to have his or her own conclusion about CO2.
Almost all conclusions will be wrong if we ever get to the truth.
Which leads to one logical conclusion:
No one knows exactly what CO2 does in the atmosphere.
Because there are too many variables that can cause climate change to pinpoint exactly what CO2 does.
So the right answer is: We do not know.
But we do have evidence that whatever CO2 does, a rise of a few ppm per year has not caused any harm at all in the past.
When you consider the locations (and timing) with the most warming since 1975 (warmer Arctic nights, mainly in the colder months of the year) and the greening of our planet from more CO2 in the atmosphere, the climate change since 1975 has been good news.
Why would anyone with sense want to prevent more good news?