Ultra-violet Radiation
Ultra-Violet radiation is a energy that moves at the speed of light (hence how it is in light). Ultra-violet light is what causes tans, and sunburns. Ultra-violet radiation has also been linked to Skin Cancer and Melanoma’s (a mole or “beauty mark” raised above the skin.)
U.V light can cause Genetic damage, how does this happen? Well...NA absorbs UV-B light and the absorbed energy can break bonds in the DNA. Most of the DNA breakages are repaired by proteins present in the cells nucleus but unrepaired genetic damage of the DNA can lead to skin cancers.
The Cancer link
The Cancer link The principle danger of skin cancer is to light-skinned peoples. A 1%decrease in the ozone layer will cause a estimated 2%increase in UV-B irradiation; it is estimated that this will lead to a 4%increase in basal carcinomas and 6%increase in squamous-cell carcinomas.
90% of the skin carcinomas are attributed to UV-B exposure and the chemical mechanism by which it causes skin cancer has been identified the above named carcinomas are relatively easy to treat, if detected in time, and are rarely fatal. But the much more dangerous malignant melanoma is not as well understood. There appears to be a correlation between brief, high intensity exposures to UV and eventual appearance (as long as 10-20years!) of melanoma.
There are also other effects.
One undisputed effect of long-term sun exposure is the premature aging of the skin due to both UV-A, UV-B and UV-C. Even careful tanning kill skin cells, damages DNA and causes permanent changes in skin connective tissue which leads to wrinkle formation in later life. There is no such thing as a safe tan.
To much sun is also dangerous to eyes, it can cause temporary clouding of the cornea. Causing temporary blindness.
To much ultraviolet radiation is also bad for the environment, causing effects such as “global warming” And because of pollution and green house gasses, a hole above the antarctic has grown. Allowing more heat into the earths atmosphere, causing ice caps to melt.
The melting icecaps are causing flooding, and forcing Eskimos (people who live in the antarctic) to move their homes further into land. Animals are going extinct because their homes are being distroyed by the water, and fresh water is soon going to be a scarcity. UV light is dangerous when its to strong, and right now that’s what is going on.

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Daneca Merchant