If you have a window to put one in a window AC unit can be life changing and you can get them for a decent price. I know it might still just be too expensive but if you can afford one i highly reccomend it. You can even bring it with you if you ever move apartments.
Yeah like during covid lockdown just people driving around less had huge positive effects on the environment. If we could just adopt some of what we did in lockdown like remote work for everyone who can do it permanently it would make a huge difference. And there are tons of ways we could just be less wasteful in general but people dont bother.