Some scientist from the Iowa State University designed and built a small device that could generate energy thanks to a piezoelectrical processes.
They chose to use and model the Cottonwood leaves because its flattened leaves oscillate in a regular pattern that optimizes energy generation due to shape and physiognomy of its leaf stalks.
It is still a prototype and much more study needs to be done, but if it succeeds will allow an off-grid energy harvesting.
Do you think it will work?
For more information please read the whole article