<prompt> Natural disasters are all except -FloodsTomedoLightening strikeAccidental radioactive gas leak from factory  <response>: Ans. is d i.e., Accidental radioactive gas leak from factory o A natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, volcanic eruptions, earthquakes, tsunamis, and other geologic processes,o Accidental radioactive gas leak from factory is most commonly a result of human or mechanical error and thus not a natural disaster. 