Final answer:
UVB light can cause skin cancer by exciting DNA molecules in skin cells, resulting in cancerous mutations. The depletion of ozone in the atmosphere leads to increased exposure to UVB radiation which raises the risk of skin cancer.
Step-by-step explanation:
UVB light can cause skin cancer. The radiation excites DNA molecules in skin cells, resulting in possible cancerous mutations. In particular, the layer of ozone in the atmosphere protects us from UVB radiation. The connection between UVB radiation and cancer is one of the reasons for concern about the depletion of ozone in the atmosphere.