Even if you're a light skinned person in the North, we don't have as much forest cover as we had back in the Neolithic era. If you only have 10% of sun exposur

Even if you're a light skinned person in the North, we don't have as much forest cover as we had back in the Neolithic era. If you only have 10% of sun exposure at a time due to trees, that's quite an effective sunblock.