When it comes to things destructive and devastating for the human race, nuclear energy, and devices are the single biggest problem and worry to the population because: of mutations/deformities of people and animals, the atmosphere getting messed up making it hard for people to breath, and lastly, when nuclear energy is used, whether that be a bomb or just radiation, it will kill everyone and everything it comes into contact with. An example is the Chernobyl Disaster.