This custom circuit is able to store up enough voltage from trees to be able to run a low-power sensor. Credit: University of Washington.
From Live Science:
Researchers have figured out a way to plug into the power generated by trees.
Scientists have known for some time that plants can conduct electricity. In fact, researchers at the Massachusetts Institute of Technology found that plants can pack up to 200 millivolts of electrical power. A millivolt is one-thousandth of a volt.
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