The epitome of a green gadget, the Water-Powered Clock is actually powered by the very salt and water mixture that occupies 70% of the earth's surface. Without the need for batteries, the Eco-Friendly clock keeps perfect time as electrodes harvest energy from the water. All you have to do to make the clock run is fill its tank up with tap water and depending on the particles that are in your water system you may need to add a small amount of table salt. All that is required is changing or adding water and a dash of salt every 2 to 3 weeks. And the clock even remembers the time as you change the water!
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