what risks do infared and ultraviolet pose to humans?
They risk the chances of giving you sunburn and this can lead to skin cancer and these waves come from the sun , we have our atmosphere to lock most of the rays out but bits of them still enter and can cause harm to human skin
Eye and skin problems.
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, Infrared radiation (IR), sometimes associated to simply as infrared, is a range of the electromagnetic radiation spectrum where wavelengths differ from about 700 nanometers (nm) to 1 millimeter (mm). These rays extend a person's risk of cataracts and several other eye problems, too. They can also crush the skin's immune system. Darker-skinned people are usually less likely to get skin cancer than light-skinned people, but they can still get cataracts and immune destruction.