This post from Eartheasy lists ten indoor plants that can help to clean up the air in your house.
Common indoor plants may provide a valuable weapon in the fight against rising levels of indoor air pollution. NASA scientists are finding them to be surprisingly useful in absorbing potentially harmful gases and cleaning the air inside homes, indoor public spaces and office buildings.
In the April 24, 2008 edition of Nature (available online only with a subscription), it is reported that the Swiss Federal Government has issued guidelines to help granting agencies "decide which research applications deeply offend the dignity of plants." Those studies that fail to treat plants with "dignity" won't be…
It's the concept of greenroofing, and it's explained in great detail at Greenroofs.com. Basically, greenroofs are vegetated roof covers, with growing media and plants taking the place of bare membrane, gravel ballast, shingles or tiles. The number of layers and the layer placement vary from system to system and greenroof…