Final answer:
UV light, particularly UV-B, can cause serious health issues like skin cancer and cataracts, but it is also necessary for vitamin D production. Monitoring exposure is essential to reduce health risks while reaping the benefits of vitamin D synthesis, and protective measures like sunscreen are encouraged.
Step-by-step explanation:
Exposure to ultraviolet (UV) light must be monitored carefully due to various health risks it poses. UV-B, a type of UV light, can lead to skin cancer by causing mutations in DNA molecules. Additionally, exposure to UV-B increases the risk of developing cataracts, which can lead to blindness. It is also associated with the suppression of the immune system, both locally and throughout the body. However, UV-B is necessary for the production of vitamin D, which is crucial for bone health and prevention of certain cancers. Consequently, a balance is needed to obtain benefits while minimizing risks.
Keeping UV exposure regulated requires protective measures such as the use of sunscreen and wearing sunglasses that block UV radiation. It is also important to monitor changes in the ozone layer, which plays a critical role in absorbing harmful UV-B and UV-C rays before they reach the Earth's surface. Given the delicate balance between beneficial and harmful effects of UV light, monitoring and managing UV exposure is vital for maintaining human health.