Researchers at the University of Manchester have designed flags that can produce energy via wind and solar power.
In a statement, the university said that the flags used "flexible piezoelectric strips and flexible photovoltaic cells."
Photovoltaic refers to a way of directly converting light from the sun into electricity, while piezoelectric strips enable the flag to generate power via movement.
"Wind and solar energies typically have intermittencies that tend to compensate each other," Andrea Cioncolini, a co-author of the study and senior lecturer in thermal hydraulics, said in a statement.