Linked from
The 10 pages that link to Ultraviolet index, each with the reason it gives.
Ozone layerRelated: Changes in ozone affect how much harmful ultraviolet reaches the ground.
SunscreenRelated: It helps relate sunscreen use to changing environmental UV intensity.
UltravioletRelated: It combines solar intensity and atmospheric conditions into an exposure measure.
IrradianceRelated: It derives from biologically weighted ultraviolet irradiance.
Basal cell carcinomaRelated: UV exposure is a major preventable contributor to the disease.
Solar radiationRelated: It translates solar ultraviolet exposure into a public health scale.
Sun protectionRelated: Its forecast helps determine when stronger protective measures are warranted.