I thought CO2 concentration was just an analog for measuring air circulation and how often the air is vented outside and therefore how many viruses would be in the air

But nope you're right! Higher CO2 concentrations keep airborne viruses viable for longer. That's wild Here's the first result when I looked it up: https://www.bristol.ac.uk/cabot/news/2024/virus.html

I thought trucks were backed in for the hitch to not stick out. Why would backing the truck in help? Just so the driver could see wtf they were doing?

Thanks for the explanation everyone! I have started to drive a truck at work and I didn't know about this

And thanks for not being jackasses while explaining too!

And fuck cars!