Day: March 21, 2017

Wood fibers make for cheap, portable water filtration

Wood fibers make for cheap, portable water filtration

The electricity-free system could be used in refugee camps. This post comes from the RSS feed of Treehugger, you can find more here!

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How to win-win when cutting environmental regulations and building walls

How to win-win when cutting environmental regulations and building walls

The art of “umdenken” – German for rethinking the problem This post comes from the RSS feed of Treehugger, you can find more here!

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Anatomy of underground cable locator

Anatomy of underground cable locator

Considering in its advancement, the cable locator has actually usually included 2 parts– a transmitter and a receiver. The transmitter puts an electrical signal onto the cable or pipeline being traced, while the receiver gets that signal, enabling the locator operator to trace the signal’s course and follow the cable map through the ground.   The electro-magnetic field developed by the transmitter can generally be set to a particular frequency, depending upon the kind of conductor in the cable. Frequency options can vary from less than 1 kilohertz to about 480 kHz. With this series of frequencies, it is necessary…

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