Final answer:
Skin lesions related to chronic sun exposure and photodamage include basal cell carcinoma, squamous cell carcinoma, and melanoma, resulting from UV radiation damaging skin cells and accelerating the aging process. Freckles and moles are also related to sun exposure, and protection measures like using sunscreen can reduce risks.
Step-by-step explanation:
Skin lesions that are directly related to chronic sun exposure and photodamage include basal cell carcinoma, squamous cell carcinoma, and melanoma. Constant exposure to UV radiation can lead to the destruction of collagen fibers and acceleration of the aging process of the skin, resulting in wrinkles. Basal cell carcinoma and squamous cell carcinoma are highly curable and originate from cells in the stratum basale and stratum spinosum, respectively. Melanoma affects melanocytes and is the most dangerous form of skin cancer, with potential to spread to other organs.
Freckles and moles can also be related to sun exposure where there is an irregular accumulation of melanocytes. While they are usually benign, they should be monitored for changes indicating potential cancer development. Protection from UV radiation, such as using sunscreen with high SPF, wearing hats, and protective clothing, can reduce the risk of these kinds of skin lesions. The degradation of the ozone layer, which filters UV radiation, could result in increased risk of skin lesions due to more UV radiation reaching the Earth's surface.