There are myriad publicly available datasets which show the relationship you seem to question. If you’d like to analyze the raw data yourself, please see climate. gov/climatedashboard
You cite 400 ppm, but you should note, per the available data that “The annual rate of increase in atmospheric carbon dioxide over the past 60 years is about 100 times faster than previous natural increases, such as those that occurred at the end of the last ice age 11,000-17,000 years ago.”
I’m not trying to be alarmist or to make any claims about the future, but the trend is quite clear. Ignoring reality is silly, it’s time to move on. We can continue to enjoy aviation and we can continue to innovate for future, lower carbon engineering solutions. It’s not either / or.
*I should note, these data were compiled by NOAA, the same organization that runs the NWS, which provides the forecast products we all use via ForeFlight, GarminPilot, aviationweather.gov. Yes- the same government source you presumably trust to ensure a safe flight.