You don't get fresh air in cities. It's different to deeply breathe in air on a trail surrounded by trees with no cars in sight than to stand on the balcony and

You don't get fresh air in cities. It's different to deeply breathe in air on a trail surrounded by trees with no cars in sight than to stand on the balcony and breathe in the contaminated air of even smaller cities. I used to only go out to do grocery shopping, but then I started exercising by cycling, and now, when I don't get out near the woods for three days, I get a real crisis. After breathing in fresh air for 30 mins or so I feel much, much better.