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    "en": "UV Radiation"
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    "en": "UV radiation is the portion of the electromagnetic (EM) spectrum between X-rays and visible light. Depending on its wavelength, UV radiation can penetrate the ozone layer and affect human health in different ways (Government of Canada, 2019). <br /> <p>Government of Canada, 2019. <a href=\"https://www.canada.ca/en/health-canada/services/health-risks-safety/radiation/types-sources/ultraviolet.html\">Ultraviolet Radiation</a>. Accessed 25 November 2019.</p>"
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    "en": [
      "All radiation is a form of energy, most of which is invisible to the human eye. Ultraviolet (UV) radiation is only one form of radiation and is measured on a scientific scale called the EM spectrum (US FDA, 2019). UV radiation is invisible energy in the wavelength range 100 to 400 nm (a nanometre is one billionth of a metre). UV radiation has a shorter wavelength and is more energetic than visible light. UV radiation comes from natural sources (such as the Sun), and artificial sources (such as black lights, welding equipment, lasers, and tanning equipment) (Government of Canada, 2019). The shorter the wavelength, the more harmful the UV radiation. However, shorter wavelength UV radiation is less able to penetrate the skin (EU, 2019; Government of Canada, 2019). UV radiation is divided into three wavelength ranges and all three bands are classified as a probable human carcinogen (Government of Canada, 2019; EU, 2019): UVA is long-range UV radiation between 320 and 400 nm. Although not as energetic as UVB, UVA can penetrate deep into the skin (dermis). This can cause immediate tanning and premature skin aging and play a role in the development of certain skin cancers. UVA is not readily absorbed by the ozone layer; about 95% gets through. UVB is short-wave UV radiation between 280 and 320 nm. It can just penetrate the outer protective layer of the skin and is responsible for delayed tanning, sunburn and most skin cancers. A large amount of UVB is absorbed by the ozone layer; only 5% reaches the Earth’s surface. UVC, with wavelengths between 100 and 280 nm, is very energetic. It is very dangerous to all forms of life (even with short exposures). However, UVC radiation is filtered out by the ozone layer, and never reaches Earth. It is created artificially to kill bacteria."
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