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The electrical climate originates form natural causes, electrical wires, radio transmitters, wireless equipment and other emitters. The latter sources of electric fields did not exist 200 years ago.
Also humans can affect the electrical climate. These perturbations are very small, but they can be detected using a high impedance amplifier.
Different measurements have shown that humans can only affect the electric field by moving their legs. If they move their arms or remain stationary the electric field is not significantly perturbed.