The sun is by far the strongest source of ultraviolet radiation in our environment Solar emissions include visible light, heat and ultraviolet (uv) radiation. Uv radiation comes naturally from the sun, but it can also be created by artificial sources used in industry, commerce and recreation. What is the uv index A measure of the level of uv radiation An important vehicle to alert people about the need to use sun protection.
Skin cancer risk is strongly correlated with the duration and frequency of sun exposure over one’s lifetime Cumulative uv dose is related to the development of. Dans notre environnement, le soleil est de loin la source de rayonnement ultraviolet la plus importante Le soleil émet de la lumière, de la chaleur et des rayons ultraviolets (uv) Les uva, les uvb et les uvc Le rayonnement ultraviolet (uv) ne peut être ni vu ni ressenti
紫外线A（UV-A）射线的波长比紫外线B（UV-B）射线更长，因此能够更深入地穿透眼睛和皮肤的组织层。UV-A和UV-B射线的能量强度也各不相同，UV-A射线的能量较低。因此，UV-A和UV-B引发的生物和健康影响存有差异。 UV-A可穿透皮肤深层，到达真皮和皮下组织，使结缔组织和血管受到影响，导致皮肤逐渐. The main factor that predisposes to the development of skin cancer is exposure to ultraviolet (uv) radiation, traditionally from the sun and more recently from artificial tanning sunbeds Both solar radiation and sunbeds are classified as carcinogenic to humans by the who international agency for research on cancer (iarc).
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