This paper examines the health consequences of ultraviolet (UV) radiation exposure, drawing on sources from the World Health Organization, the Environmental Protection Agency, and peer-reviewed literature. It discusses how overexposure damages skin cells, accelerates aging, promotes skin cancer, and injures the eyes. The paper also addresses UV radiation's suppression of the immune system and its role in promoting certain infections. A key section explores how industrial pollutants and ozone-depleting chemicals such as chlorofluorocarbons have thinned the stratospheric ozone layer, increasing UV penetration globally. The paper concludes with practical protective measures, including sun avoidance during peak hours, protective clothing, sunscreen use, and public education initiatives.
Current studies show that the world's exposure to ultraviolet radiation has increased over the past few years. It has also been established that, over the longer term, UV radiation induces degenerative changes in cells of the skin, fibrous tissue, and blood vessels, leading to premature skin aging, photodermatosis, and actinic keratosis (World Health Organization, 2012).
The world's largest source of ultraviolet radiation is sunlight. Other sources include man-made UV lamps, bactericidal lamps, and mercury vapor lamps. Instruments used in industrial processes and in medical and dental practices also serve as additional sources of ultraviolet radiation.
Overexposure to ultraviolet radiation causes tanning of the skin. The radiation is absorbed by the skin, causing an increase in the number of melanocytes — the cells responsible for producing melanin. Overexposure leads to premature skin aging and precancerous skin changes known as actinic keratosis. In cases where skin damage is severe, skin cancer may develop.
In addition, ultraviolet radiation can cause painful temporary injuries to the eye, including photokeratitis and conjunctivitis. Exposure to solar UV can also prematurely age the lens of the eye, causing cataracts, pterygium growth, macular degeneration, and eyelid cancers.
According to Daynes (1990), prolonged sun exposure has significant negative impacts on the immune system. UV radiation suppresses the body's resistance to bacterial agents and increases the risk of infections such as meningitis. It also fosters the growth of smallpox lesions and promotes the spread of Herpes Simplex Virus I and II.
"How industrial pollutants thin the ozone layer"
The depletion of the stratospheric ozone shield, first observed in Antarctica about a decade ago, has since spread over the Northern Hemisphere and across the entire globe. The depletion is most severe in Antarctica, making human populations there particularly vulnerable to increased ultraviolet penetration (Leaf, 1993).
Limiting exposure to the sun's UV rays between 10 a.m. and 4 p.m. can significantly reduce health hazards associated with radiation. Avoiding prolonged outdoor activity during these peak hours reduces long-term sun damage and related medical conditions. Reducing time spent walking, window shopping, or performing outdoor chores at midday is therefore an important protective strategy.
Wearing a wide-brimmed hat while outdoors offers good protection for the eyes, ears, face, and the back of the neck. Wearing protective sunglasses that provide 99 to 100% UV-A and UV-B protection reduces eye damage from sun exposure. Clothing that is tightly woven and loosely fitted provides additional physical protection from solar radiation.
Using broad-spectrum sunscreens reduces the harm of UV exposure, as they contain active ingredients that absorb approximately 85% of UV radiation. Applying sunscreens with a Sun Protection Factor (SPF) of at least 15 filters both UV-A and UV-B radiation. Sunscreen should be reapplied every two hours, especially after working or exercising outdoors, and should be applied to all exposed skin approximately 20 minutes before going outside in order to provide maximum protection.
The provision of informed public education is central to raising awareness of the dangers of ultraviolet radiation. Clear and practical educational information helps the public make well-informed decisions regarding UV radiation and its health risks.
One effective method of disseminating this information is through the issuance of radiation handbooks. These handbooks assist in collecting, managing, and distributing relevant environmental information to the public. They can reach a wide audience and provide practical guidance on UV radiation risks. Furthermore, such handbooks can support community-level projects that help locals build monitoring infrastructure and share environmental information with others.
"Public education and radiation handbooks as awareness tools"
You’re 77% through this paper. Sign up to read the remaining 2 sections.
Sign Up Now — Instant Access Already a member? Log inAlways verify citation format against your institution’s current style guide requirements.