By using our personal electromagnetic field to "charge" digital flares, we would be able to send out a signal to help pinpoint a location.
Reading an article about the third industrial revolution
"Viva la Revolution": How the “energy Internet” will transform political power by democratizing green power, I made a leap to how the human body can produce light and electrical charges.
Johan Boswinkel, an oddball "inventor" of a sort in New Zeeland uses light to heal people ailments, or rather uses the anomalies in human light patterns to identify sickness and light to realign them. What if we were able to use that light to "charge" a
small device concealed on your person. Unlike a GPS or tracking device. It would be a "flare" set off only in times of great distress, allowing human rights workers, journalists, and others in dangerous circumstances the ability to send out a directed call.