False positives are things that may have been considered paranormal but identified to be of a natural source.
Orbs are often considered to be paranormal however, the vast majority are natural in cause. Dust, pollen, lint ,moisture and reflections are the most common things to create "orbs"..
Streaks of light .This one was identified as a street lamp outside of the building. The slow shutter time of the camera and the slight movement of the photographer is the cause of this streak of "energy".
Mists
Breathing out when taking a photo in cold conditions is the cause of the above mists.
