What Causes Lightning

Thanks to Ronald L. Holle Consultant, Vaisala, Inc. Tucson, Arizona and Daile Zhang PhD Candidate, Dept. of Hydrology and Atmospheric Sciences University of Arizona, Tucson, Arizona, and Vaisala the attached booklet answers this question. It provides understand of lightning safety and the need for lightning protection systems and power surge protector devices. For more information see vaisala.com/lightning ©