What is the estimated increase in non-melanoma skin cancers for each 1% decrease in ozone concentration?

• A. 2% increase
• B. 4% increase
• C. 6% increase
• D. 8% increase

Answer: (B)

The correct response indicates that for each 1% decrease in ozone concentration, there is an estimated 4% increase in non-melanoma skin cancers. This relationship is based on scientific studies that have examined the connection between ozone layer depletion and the increase in UV radiation reaching the Earth's surface.

As the ozone layer thins, it allows more harmful ultraviolet (UV) radiation to penetrate the atmosphere. A 1% decrease in ozone leads to enhanced UV exposure, which is directly linked to an increase in the incidence of skin cancers, particularly non-melanoma types like basal cell carcinoma and squamous cell carcinoma.

Understanding this link is crucial for awareness of environmental health impacts and emphasizes the importance of ozone protection measures to help mitigate skin cancer risks.