I doubt they ignore it. People that are obese and fine with it are a minority. That doesn't mean it's easy to stop being obese. Compared to obesity, CO2 doesn't

I doubt they ignore it. People that are obese and fine with it are a minority. That doesn't mean it's easy to stop being obese. Compared to obesity, CO2 doesn't have genetic factors, the science on it is clear, there are easy solutions to monitor it. You could also do something like make people do a test in a CO2-heavy room and in a CO2-light room. On the other hand, you can't show obese people what it's like to not be obese, or non obese people what it's like to be. The two situations are very different.