> Electricity. It doesn't leak from cables.
https://en.wikipedia.org/wiki/Corona_discharge
"[...] Corona discharge from high voltage electric power transmission lines constitutes an economically significant waste of energy for utilities."
https://en.wikipedia.org/wiki/Overhead_power_line
"Transmission higher than 132 kV poses the problem of corona discharge, which causes significant power loss and interference with communication circuits. [...]"
It might be unexpected and surprising, but yes, electricity does leak from cables!
