See post 5. Your assertion is not scientifically supported.
The CO2 level was rising between 1940 and 1970 but the average global temperature dropped during that period.
Post-hoc analysis of this period indicates that the cooling was likely a combination of natural variability and sulfate aerosols introduced into the atmosphere by the burning of coal.
Which makes an argument for using proxy estimates based on tree rings above the inversion layer that exists in periods of ground haze making surface thermometers useless as representations of atmospheric temperature.
We may have enough radiosonde data from 1940-1970 to look at the effect of aerosols, inversion traps, surface reports and CO2 data.