Final answer:
UVB radiation can cause skin cancer, which is a problem that does not occur with UVA exposure.
Step-by-step explanation:
One problem caused by UVB radiation that does not occur with UVA exposure is skin cancer. UVB radiation can excite DNA molecules in skin cells, leading to possible cancerous mutations. The connection between UVB radiation and skin cancer is one of the reasons for concern about the depletion of ozone in the atmosphere, as the ozone layer protects us from UVB radiation.