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Stratospheric Ozone Depletion

The thinning of the ozone layer, which acts as a sunscreen for the earth, is caused by ozone-depleting substances, such as chloroflurocarbons (CFCs), which cause more than 80% of ozone depletion.

One type of UV radiation, UV-B mutates genetic material, which can lead to increased skin cancer, reduction in crop yields and cause eye damage.

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The World Health Organization has stated that there are no safe levels of human exposure to ground-level ozone, a key component of smog.