The UV radiation that reaches the ground is divided into three types: UVA, UVB, and UVC. UVA rays are the least harmful, and they are responsible for most of the skin tanning that occurs when people are exposed to sunlight. UVB rays are more harmful than UVA rays, and they can cause sunburn and skin cancer. UVC rays are the most harmful type of UV radiation, but they are almost completely filtered by the atmosphere and do not reach the ground.
The amount of UV radiation that reaches the ground varies depending on a number of factors, including the time of day, the season, the latitude, and the weather conditions. UV radiation is strongest during the middle of the day and in the summer months. It is also stronger at lower latitudes and on clear days.
People can protect themselves from the harmful effects of UV radiation by taking precautions such as seeking shade, wearing protective clothing, and using sunscreen.
