We bought a pothos plant yesterday. In addition to adding a natural splash to your decor, indoor plants are a great way to keep your home's air clean. I found this list of the top 20 air purifying plants. Number one is the Boston fern. Pothos isn't on the list, but I read somewhere else that it's also a pretty good purifier. From what I've read, you need about one 6'' plant per 100 square feet to keep your air clear. One down ten to go.