What are the actual and potential consequences of nuclear leaks and meltdowns?

Thesis statement:
Over the years, nuclear leaks have become an increasingly dangerous problem with damaging effects on earth, animals, and humans.

1st topic sentence:
The most significant effect done by nuclear leaks is earth pollution.
- The Chernobyl disaster triggered the release of substantial amounts of radiation into the atmosphere in the form of both particle and gaseous radioisotopes, and is the most significant unintentional release of radiation into the environment to date.
- A large swath of pine forest killed by acute radiation was named the Red Forest. The dead pines were bulldozed and buried.

2nd topic sentence:
Nuclear leaks, due to their radioactivity, have a harmful effect on animals.
- Information regarding physical deformities in the plant and animal populations in the areas affected by radioactive fallout require capture and DNA testing of individuals to determine if abnormalities are the result of natural mutation, radiation poisoning, or exposure to other contaminants in the environment such as pesticides, industrial waste, or agricultural run-off.

3rd topic sentence:
Pollution of this source can be deadly for the humans.
- According to the American Nuclear Society, using the official radiation emission figures, "The average radiation dose to people living within ten miles of the Three miles island plant was eight millirem, and no more than 100 millirem to any single individual. Eight millirem is about equal to a chest X-ray, and 100 millirem is about a third of the average background level of radiation received by US residents in a year."
- It can alter genetic material of all the living things for thousands of years.