> The better question is why aren’t we ventilating
Industrial places: they have AC but unfortunately the way most if not all of these are built they're germ spreaders rather than germ catchers. Retrofitting or modifying existing installations is expensive and the tradespeople doing this kind of job have been in high demand everywhere since years now.
Schools: same as above - ACs or ventilation in schools exist mostly in new buildings which have had energy efficiency requirements respected during design, retrofitting is often impossible (e.g. due to low room heights), and the "there are no tradespeople" argument from above also applies here, with the added difficulty that government jobs pay pennies compared to what industry puts up. To make stuff worse: many school buildings have outright broken windows - in Cologne / Germany for example one in five schools has windows that don't open, sometimes for many years (https://www.ksta.de/koeln/keine-lueftung-moeglich-trotz-coro...).
Windows not opening might be intentional. I've worked in a couple of tall buildings where the windows don't open very far. Someone told me it was so people can't jump out, though I always suspected it was so you couldn't mess up the temperature on the floor.
Industrial places: they have AC but unfortunately the way most if not all of these are built they're germ spreaders rather than germ catchers. Retrofitting or modifying existing installations is expensive and the tradespeople doing this kind of job have been in high demand everywhere since years now.
Schools: same as above - ACs or ventilation in schools exist mostly in new buildings which have had energy efficiency requirements respected during design, retrofitting is often impossible (e.g. due to low room heights), and the "there are no tradespeople" argument from above also applies here, with the added difficulty that government jobs pay pennies compared to what industry puts up. To make stuff worse: many school buildings have outright broken windows - in Cologne / Germany for example one in five schools has windows that don't open, sometimes for many years (https://www.ksta.de/koeln/keine-lueftung-moeglich-trotz-coro...).