Exposure to ultraviolet radiation from the sun can seriously harm human health. Mild exposure can lead to sunburn. More extended exposure to the sun may result in premature aging and discoloration of the skin and, ultimately, skin cancer. These health effects have only been made more acute by the destruction of the ozone layer which protects the earth from the sun's ultraviolet radiation. Through the Clean Air Act regulations and participation in international accords such as the Montreal protocol, the United States is participating in a worldwide effort to reduce the amount of ozone-depleting gasses released into the atmosphere. The EPA and other agencies also promote awareness of the dangers of sun exposure and the safety precautions such as minimizing exposure and using sunscreen.
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