Mywife was vomittingcaiseshedu -
Air quality. I have air purifiers in living room and bedroom. I been going out in my n95 mask for at least ten years now. Before I was the weirdo with the mask, I guess I still am because it is massive compared to the other ones. I have a particulate meter to measure particles. I'm always focused on breathing in traffic, never breathe in when the light gets green or after corners which is where most people push the gas the most. I am stalling starting a family until I can move to a neighborhood with better air. You can say it's an obsession I guess.
Edit, I always know which way the wind is blowing so I know which way to sweep leaves for example. At night when there is not much wind to verify direction I sprinkle dust and check with my flashlight which way the dust moves.