A live plant can be a great, chic accessory and a handy oxygen generator right under your nose!
My plants would be happier with a piggie friend for when I'm not around.
Ingenious! When the squirrel in his hole is hiding you'll know the plant in the top needs more water. Then the squirrel will be all kinds of welcoming.
Available at: Perpetual Kid http://www.perpetualkid.com/power-planter.aspx ($16)
Some people are seriously serious about where their coffee comes from. No question of provenance when you grow it yourself!
Be your own miniature urban improvement league.
Intimidate your plants into staying alive when you leave town for a weekend.