Brought to you by  Three Plants That Give You Better Indoor Air
Kamal Meattle used three just three indoor plant species to
increase oxygen, filter air, and boost general health at a a New
Delhi business park. You can use them, too, in any indoor
environment. Meattle’s presentation at the TED 2009 conference
details a large-scale success, using thousands of plants for
hundreds of workers. In any living or working space, though, the
three plants—Areca palm, Mother-in-law’s Tongue, and a “Money
Plant”—can be used to convert carbon dioxide into oxygen, remove
organic compounds, and generally filter and freshen the ambient
air. A single person looks to need a minimum of 11 total plants,
and certain climates with less sunlight could require a bit of
hydroponic growing, but Meattle swears by the health,
productivity, and atmosphere benefits. Check out the detailed
slides from his TED talk:  Got your own plant combinations for
better working or living air? Give up your greenery tricks in
the comments.