In the Matrix the movie machines used fields of humans to efficiently harvest electricity from them. In the endeavor to find a renewable carbon free energy source I can only see using plants this way.
Would it be efficient to harvest electricity from a field plants like potatoes?
Copper is said to be toxic to plants and is a main component in using a plant as an electrochemical cell. At least one of the two probes in the plant would have to be modified to not be toxic, be at an exposure not to be so toxic to prevent the plant from growing or healing or moved periodically.
Solar power alone would eventually blocks all sunlight from the ground. You would also have to clear land to provide it. I could imagine a semi-transparent cell that would allow healthy light to pass but that has not been invented.
The plant would still provide oxygen as it normally does while providing clean electricity.
What would a kilometer of trees or potatoes provide in power?
In this link below the answers mostly addresses whether an individual plant could survive this process and provide the process in which electricity is made. I am interested in the large scale of this process. https://biology.stackexchange.com/questions/82692/living-potato-clock