However, speaking of Sun and white skin:

 It is much easier to get skin Cancer on a cloudy day than a day with full sun? Why is this?

Because the ultraviolet I think doesn't make it through the clouds and then the infrared gets you but you think you are protected by the clouds but you are not.

So, this is why people in cloudy areas who have white skin can get skin cancer so easily without full sun in their faces or getting sunburned. I learned this from my dermatologist sometime between now and 1995. 

In 1995 my aunt died of a melanoma when one on her arm went into her intestines it metasticized and she died.

So, my mother and I started going to dermatologists so we wouldn't die of skin cancer too. So, both my aunt's death and my father's death helped me go more to doctors of all kinds including dermatologists to freeze off precancers before they got bigger or metasticized and became fatal.

Often younger people die of skin Cancer between 18 and 30 because they have no idea at all what to look for regarding skin cancer to stay alive.

They just think they are sun worshippers and healthy and then they are dead.

So, this is pretty serious stuff these days to be aware of especially if you have white skin.