Radiation of any type can cause skin cancer etc and it speeds up the growth rate of cells in our body and may cause burns in high amounts of doses. The ever-so-common sunburn is actually a radiation burn because the sun gives off radiation. This is also why people who stay out in the sun without proper protection from it are more likely to get skin cancer. This is because skin cancer is the rapid and uncontrolled growth of cells.
Also, the risk of developing cancer and hereditary defects from exposure to ionising radiation, which increases slightly for young people. Exposing oneself to radiation can harm your body in many ways to will eventually lead to death.
Nuclear radiation can be both extremely beneficial and extremely dangerous. It just depends on how you use it. X-ray machines, some types of sterilization equipment and nuclear power plants all use nuclear radiation but many substance, when exposed to our body, can harm us fatally. Also, radiation is transmitted through the wind and the radiation from Japan can reach Singapore because of the wind travelling in that direction.
Citation/Bibliography
http://www.hse.gov.uk/youngpeople/risks/radiation.htm
http://www.howstuffworks.com/nuclear.htm
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