I don't understand do you have any references that I could look up?The earth and atmosphere also have a ( near DC ) field, can be many volts per meter, but at a high impedance so collecting energy is low until it is hit by lightening.
Ah! so that's why we aren't plugged into towers,you couldn't have explained it better.Thankyou.Think High Voltage e.g. several hundred volts at miniscule currents e.g. nanoamperes. The power output of an antenna is very small on the order of microwatts.
I don't understand do you have any references that I could look up?