human
I'm looking for information on the ozone layer and the effects of pollution on it.
assistant
The ozone layer is a region of the upper atmosphere composed mainly of oxygen molecules that absorbs some ultraviolet radiation from the sun, protecting life on Earth. Ozone depletion refers to a decrease in the concentration of ozone in the stratosphere caused by human activities such as the use of chlorofluorocarbons (CFCs). This has led to an increase in UVB radiation reaching the surface of the earth, which can cause skin cancer, cataracts and other health problems.