Eons and eras are the divisions
An arc flash can occur when differences of potential voltage reading exists. An arc flash an enormous amount of radiant energy that explodes outwards from electrical equipment, creating pressure waves These high intensity pressure waves can damage a person's hearing or even eyesight.
Answer:
Mitochondrial DNA is circular, so it doesn't shorten when it replicates unlike the rest.
B. Soil Contamination
All the other answers are talking about clean and pure things while this answer is the only negative one. So B is your answer.
