Exposure to UV-B radiation can cause a lot of diseases: Examples of such are skin cancer (The most common one), eye disease, skin ageing and a lot other more that is damaging to humans. It can also cause damage to the human immue system. Do note that, UV-B radiation always have effect on humans since the past. Now, the effects of UV are becoming more obvious as humans like to spend time in the sun and expose their skin to the UV in the process. An increase in UV-B that reach the earth as Ozone depletion may worsened the effect that sun-tanning have created and may result in cancer.