When two dissimilar metals are separated by an electrolyte a voltage potential is produced. This is how batteries work. We learned this somewhere around grades 4 through 6, we made batteries with lemons and potatoes. An 11 year old boy named Derek did well in science fairs with a well...
Dutch has had a response to his FOI request for material on HAARP and he's very excited about it
He could of course have saved the bother (and the wasted paper) and looked up the information online
For example:
The WIND-HAARP Experiment
Abstract. Results from the first science experiment...