This is already a thing. I rememeber a several years back watching a show where someone was cannistering Australian air and selling it to Chinese buyers and watching someone in China inhaling the cannister with a breathing device as a way to 'clear' their lungs from polluted air or something of the like.

Edit: ohh wow I found the article! https://www.smh.com.au/business/small-business/australian-entrepreneurs-sell-cans-of-clean-air-to-china-20160502-gojugx.html