Most Efficient Filtering Plant: Boston Fern

The Boston Fern (Nephrolepis exaltata) — it’s the plant that’s the most efficient at removing formaldehyde (the most common indoor air pollutant). See our post on How To Grow Fresh Air for more information.

An Intelligent Indoor Plant Light

It’s great to brighten up a cold winter day by growing plants under lights indoors. This device aims to make indoor growing easier. It has a grow light (a full-spectrum 9-watt fluorescent), and the lamp turns on and off every day, simulating the changing length of days with the passing seasons. The Intelligent Plant Grow Light also has an adjustable …

Most Efficient Water Cleaner: Terra Cotta Gravity Water Filter and Cooler


Here is another efficient ceramic water filter. This gravity filter has a hand-made terracotta base, which cools the water using natural convention. We consider it metaefficient because: its has excellent filtration, and a very long filter life (years). Also, the terracotta doesn’t leach contaminants into the water, and it keeps the water cool without needing external energy. It’s available from …

Berkey Light Gravity-Flow Water Filter


Gravity filters are more effective than other types of water filter, because the water drips slowly through the ceramic elements, and this process removes almost all the contaminants in water. The filters can be cleaned with a toothbrush and last for up to 2,000 gallons. This Berkey filters filter uses Black Berkey elements, and they are self-sterilizing. The Berkey filters remove …