This can be explained by a few factors:
People in northern countries often have lighter skin, which is more susceptible to UV damage. Additionally, less frequent sun exposure can lead to riskier behavior, such as overexposure on sunny days or during vacations.
Despite the cooler climate, UV rays can still be strong in northern regions. Lastly, people in sunnier countries might be more conscious about sun protection, which helps reduce their risk of skin cancer.
If we are to believe the first humans came from Africa and were dark-skinned it makes sense when we migrated to less sunny places, our skin lightened up to absorb the less frequent rays from the sun. This is why black people who live in northern climates have higher incidences of disease and certain cancers. Due to the high levels of melanin in their dark skin they cannot absorb the benefits of less sunshine. Likewise, they are protected by their high melanin from the damage caused by UV light from the strong sun. Fair-skinned people can adapt to the hot tropics by limiting sun exposure and gradually increasing it over time. Seed oils have been a huge contributer to excessive sun burning whereas saturated animal fat is protective...
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