Solar Water Heaters Now Mandatory In Hawaii

Solar Water Heater On Rooftop

Hawaii has become the first state to require solar water heaters in new homes. The bill was signed into law by Governor Linda Lingle, a Republican. It requires the energy-saving systems in homes starting in 2010. It prohibits issuing building permits for single-family homes that do not have solar water heaters. Hawaii relies on imported […]

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Electric Folding Bikes: Ultra-Efficient City Travel

Dahon Mu With Bionx Folded

Folding bikes are particularly efficient when used in conjunction with public transit. Unlike regular bikes, they can be taken easily on buses, trains or ferries. In fact, some transit systems will only allow folding bikes to be taken on board. I recently reviewed the Best Folding Bikes of 2008. An efficient addition to these bikes […]

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SolarDucts: Heating Air and Generating Power

Solar Duct Solar Air Heater and Cogenerator

Solar energy is often used to heat water or generate electricity, but it can also be used to heat air. The SolarDuct is a new device that uses sunlight to heat air before it enter a ventilator. They are modular units that can be installed on buildings with flat roofs.

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Trailerbikes: A 2008 Review and Buying Guide

A trailer bike is a one-wheeled bike extension that attaches to the back of your bike. They are an efficient way to bring your child on a longer bike ride. Your smaller companion can assist you with pedaling, while you control the steering and speed. This allows your child to become familiar with the process […]

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