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Which health problems are linked to increased exposure to ultraviolet radiation from ozone depletion?
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Ozone depletion
The Antarctic ozone hole reaches its maximum extent in October of each year. On October 7, 2021, when this image was captured, the Antarctic ozone hole spanned 24.8 million square km (9.6 million square miles).
The depletion of the ozone layer allows increased levels of ultraviolet (UV) radiation to reach the Earth's surface, which poses significant risks to human health.12
Increased exposure to this radiation is linked to several serious health conditions:
- Skin Cancer: Prolonged or repeated exposure to high doses of UV radiation is a known cause of various skin cancers, including melanoma.342
- Eye Damage: Increased UV exposure is associated with the development of eye cataracts, a clouding of the eye's lens that can impair vision.2
- Immune System Damage: Elevated levels of UV radiation can suppress or damage the immune system, potentially reducing the body's ability to defend against diseases.2
- Genetic Damage: UV light is mutagenic; it can damage DNA by causing the covalent linking of adjacent pyrimidine bases, known as pyrimidine dimerization, which can lead to harmful genetic mutations.32
While the body has natural protective mechanisms, such as melanin pigmentation, excessive UV exposure remains a critical public health concern that has necessitated international action, such as the Montreal Protocol, to mitigate further depletion of the ozone layer.412