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25-04-2017, 08:09 PM

I need about noise pollution:
Introduction
Selection of topic
Objectives
Importance
Methodology
Survey
Questions on survey
Observation
Conclusion

jaseela123d · 26-04-2017, 09:20 AM

Radioactive contamination can be defined as the release of radioactive substances or high energy particles into the air, water or land as a result of human activity, either by accident or by design.

Sources of such wastes include:

1) nuclear weapons testing or detonation;

2) the nuclear fuel cycle, including the extraction, separation and production of nuclear material for use in nuclear power plants or nuclear bombs;

3) accidental release of radioactive material from nuclear power plants.

Sometimes natural sources of radioactivity, such as radon gas emitted below ground, are considered contaminants when they become a threat to human health.

Since even a small amount of radiation exposure can have serious (and cumulative) biological consequences, and since many radioactive wastes remain toxic for centuries, radioactive contamination is a serious environmental concern, although natural sources of radioactivity exceed in Much to the artificial ones.

The problem of radioactive contamination is aggravated by the difficulty of evaluating its effects. Radioactive waste can be spread over a large area rather quickly and irregularly (from an abandoned landfill to an aquifer, for example) and may not fully show its effects on humans and organisms for decades in the form of cancer or other diseases Chronicles. For example, radioactive iodine-131, although of short duration, can leave those who ingest it with long-term health problems. At the time a radioactive leak is revealed and a health survey is conducted, many of the individuals affected by the leak may have already moved out of the area (or deceased without being examined with the possible cause in mind). In addition, since most radioactive materials are under the jurisdiction of government agencies - usually in secret military and military establishments - the dumping activities and accidental discharges that accompany the production of nuclear materials and bomb tests tend to Remain hidden until governments are forced to disclose them Public pressure.

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