Trees, nature’s air purifiers, are inexpensive and easy to plant. In my area (San Jose), there’s an organization called Our City Forest. It helps people choose the right tree for their location, demonstrates how to plant it, and gives it to to the person for free (donation requested). If the person is older or disabled, they’ll even send out someone to plant it for them.
Does your community have such an organization? If not, propose it. See Our City Forest details at www.ourcityforest.org so you can offer your city some information about how a successful program can operate.
[For more easy, money-saving, Earth-friendly tips, download a FREE copy of Green Riches: Help the Earth & Your Budget. Go to www.Smashwords.com/books/view/7000 or your favorite e-book seller and download to your computer or e-book device. Totally free, with no strings attached.]