What negative effect does increased UV light exposure have on human health?

• A. Decreased heart function
• B. Increased instances of respiratory diseases
• C. Development of skin cancers and cataracts
• D. Increased sensitivity to cold temperatures

Answer: (C)

Increased UV light exposure poses significant risks to human health, particularly through the development of skin cancers and cataracts. UV radiation can damage the DNA in skin cells, leading to mutations that potentially result in skin cancer, including melanoma, which is the most serious type of skin cancer. Furthermore, UV exposure is a well-documented risk factor for cataracts, a condition where the lens of the eye becomes cloudy, impairing vision and potentially leading to blindness if untreated.

Understanding the impacts of UV light is crucial for both prevention and education on protective measures. For instance, it highlights the importance of using sunscreen, wearing protective clothing, and utilizing sunglasses that block UV rays to reduce these health risks.