Everything Is an Energy Source: The Potential of Micropower Collection

> Even a baguette, surprisingly enough, can provide enough electricity to light up an LED.

This make no sense. Did they rediscover the Galvanic battery? In that case, the energy comes from the wires made of different materials, not from the baguette.

Does someone have a more technical explanation because the press article is horrible.

The electricity we use in our daily lives is supplied by a vast transmission network