If you live in a city, try growing your own fresh air.
See this video and page. It’s only four minutes and very worth it. Scroll down the page to see the details on the plants.
Call your local greenhouse and ask to order:
* 4 x Areca Palm (Chrysalidocarpus lutescens) $50 each = $200
* 8 x Mother-in-law’s Tongue (Sansevieria trifasciata) $40 each = $320
* 4 x Money Plant (Epipremnum aureum) $30 each = $120
A total of $640 spent for clean air for the next few years. Good deal. We’ll see if it makes a real difference.
I just wanted to post it here in case this appeals to you, too.