UVB rays can also cause sunburn, and play a key role in the development of skin cancer.

The sun is the primary source of UV radiation, which can damage the DNA in skin cells and lead to skin cancer.
UVB radiation is the primary cause of skin cancer, but UVA and UVB rays can also cause sunburn.
UVB rays are the main cause of skin cancer, but UVA and UVB rays can also cause sunburn.