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11
votes
2answers
370 views

How harmful is the rising/setting sun?

Often, while hiking, my companions and I treat the very early/late sun as being less harmful (as far as skin cancer and UV radiation are concerned). For example, we might not apply sunscreen ...
8
votes
1answer
77 views

Is there simple guidance on sunburn risk associated with altitude?

When skiing, if the weather is good, I often come back with a better tan than if I have been at the beach. Obviously with altitude, there is less blocking of UV rays by the atmosphere. But how much ...
5
votes
2answers
164 views

Does a red headscarf or hat provide better protection from the sun?

I read in an old tourist guide (from the beginning of the 20th century) that during mountain walks on sunny days one should wear a red headscarf or a hat with red lining to avoid heat stroke, because ...