Containment, Treatment & Distribution The concept used for containment, treatment and distribution of sewage-water is based on and draws information from the wetlands concept which has long been used in exterior applications for thousands of years by humans and nature.
The Earthship sewage system differs from the wetlands approach in that it primarily treats the gray water inside the building and the sewage from the toilet outside of the building, both in smaller areas. Greywater is the used water after all receptacles except the toilet. All household sewage is used & reused in the interior and exterior planters, called botanical cells.
read more at http://earthship.com/sewage-treatment

video by Francis Gendron

Indoor plants like an mini air conditioners and filters to adjust and clean the air around us. They are working hard to absorb carbon dioxide at night and release oxygen on days to incessantly providing humans with natural oxygen.

Adiantum Absorbs Radiation from Computer and Printer.
http://en.wikipedia.org/wiki/Adiantum
Adiantum absorbs 20 micrograms of formaldehyde per hour, it is considered the most effective natural cleaner. If you work with paints or having smokers around you, you should have some of them in your workplace. Besides, it can contain Xylene and Toluene released by monitors and printers.

"Michael Reynolds wasn't kidding when he said indoor food production helps to oxygenate the air.
The following video supports the idea..."